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Texas A&M University
1.
Jeon, Ju Won.
Charge Storage in Organic Electrodes for Energy & Electrochemical Applications.
Degree: 2014, Texas A&M University
URL: http://hdl.handle.net/1969.1/153935 
► Energy storage has been emerging as an important research topic because of the lack of fossil fuels and growing energy consumption. This thesis focuses on…
(more)
▼ Energy storage has been emerging as an important research topic because of the lack of fossil fuels and growing
energy consumption. This thesis focuses on synthesis and characterization of electrode materials such as polyaniline, graphene, and nitrogen-doped porous carbon for use in
energy storage applications.
Polyaniline (PANI), a conjugated polymer, has been widely investigated as an electrode material for
energy storage. In order to enhance its oxidative stability, polyaniline:poly(2-acrylamido-2-methyl-1-propanesulfonic acid) (PANI:PAAMPSA) complex was synthesized using template polymerization. PANI:PAAMPSA possessed significantly increased oxidative stability up to 4.5 V (vs. Li/Li+) due to electrostatic and hydrogen bonding interactions between PANI and PAAMPSA. This polyacid-doped PANI showed a reversible capacity of 230 mAh/gPANI for over 800 cycles.
Three different polyaniline-based layer-by-layer (LbL) electrodes, PANI/PAAMPSA, PANI/PANI:PAAMPSA, and linear poly(ethylenimine)/PANI:PAAMPSA were fabricated and their charge
storage natures were assessed in non-aqueous
energy storage systems. PANI:PAAMPSA retained its oxidative stability within LbL electrodes. The PANI/PAAMPSA LbL electrode did not show enhanced oxidative stability as compared to PANI:PAAMPSA complexes, which indicates that the interactions between PANI and PAAMPSA are not as strong as in PANI:PAAMPSA complexes.
Porous PANI nanofiber/graphene hybrid electrodes were prepared by electrochemical reduction of PANI nanofiber/graphene oxide (PANI NF/GO) LbL assemblies at 1.5 V (vs. Li/Li+). The limited processibility of reduced graphene oxide was circumvented by using GO to build up PANI NF/GO LbL films followed by electrochemical reduction. PANI NF/electrochemically reduced graphene oxide (ERGO) LbL electrodes show high capacity and enhanced cycling stability. Its performance is strongly dependent on electrode thickness.
Nitrogen-doped porous carbon was synthesized by one-step carbonization of isorecticular metal-organic frameworks (IRMOF-3). Porous IRMOF-3 itself acts as a self-sacrificial template to provide porous structure. Furthermore, additional carbon and nitrogen sources were not required. The nitrogen content can be easily controlled by varying carbonization temperature. Nitrogen-doped porous carbon possessed significantly higher capacitance due to additional pseudocapacitance originating from nitrogen as compared to analogous nitrogen-free porous carbons.
Advisors/Committee Members: Lutkenhaus, Jodie L (advisor), Balbuena, Perla (committee member), Grunlan, Jamie (committee member), Wooley, Karen L (committee member).
Subjects/Keywords: Energy storage
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APA (6th Edition):
Jeon, J. W. (2014). Charge Storage in Organic Electrodes for Energy & Electrochemical Applications. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/153935
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Jeon, Ju Won. “Charge Storage in Organic Electrodes for Energy & Electrochemical Applications.” 2014. Thesis, Texas A&M University. Accessed January 24, 2020.
http://hdl.handle.net/1969.1/153935.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Jeon, Ju Won. “Charge Storage in Organic Electrodes for Energy & Electrochemical Applications.” 2014. Web. 24 Jan 2020.
Vancouver:
Jeon JW. Charge Storage in Organic Electrodes for Energy & Electrochemical Applications. [Internet] [Thesis]. Texas A&M University; 2014. [cited 2020 Jan 24].
Available from: http://hdl.handle.net/1969.1/153935.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Jeon JW. Charge Storage in Organic Electrodes for Energy & Electrochemical Applications. [Thesis]. Texas A&M University; 2014. Available from: http://hdl.handle.net/1969.1/153935
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Hong Kong
2.
Wang, Zhongwei.
On some aspects of frequency regulation market design and
analysis.
Degree: PhD, 2017, University of Hong Kong
URL: http://hdl.handle.net/10722/241405
► To maintain the real-time balance of power generation and load, it is necessary to procure frequency regulation services in the power system operation. During past…
(more)
▼ To maintain the real-time balance of power
generation and load, it is necessary to procure frequency
regulation services in the power system operation. During past two
decades, the growing integration of intermittent renewable energy
sources has brought more uncertainties to grid operation, enhancing
the need for high-performance regulation services. Energy storage
systems have extensive applications in today’s power system
operation. Among all types of energy storage systems,
energy-limited and fast-responding storage devices including
battery energy storage, flywheel energy storage, superconducting
magnetic energy storage, and super-capacitor energy storage can
provide high-performance regulation services due to their fast
ramping capability and controllability. However, traditionally,
regulated systems do not distinguish high-performance frequency
from the rest. There is a lack of incentives for fast-ramping units
to provide regulation Therefore, it is necessary to adjust the
frequency regulation market design to encourage devices/units with
better regulation performance to participate in the market.
A
frequency regulation market model considering regulation
performance is proposed in this thesis. In the proposed market,
both regulation capacity constraints and regulation mileage
constraints are satisfied. Fast-ramping regulation units have
higher priorities to be cleared in providing regulation services.
Market clearing prices are derived with Lagrange relaxation. The
analysis of the components of market clearing prices accurately
indicates the relationship between regulation capacity and mileage.
In response to the performance-based regulation market model, an
adjusted AGC allocation method is proposed. The numerical results
show that the proposed market model could give incentives to
fast-ramping storage units to provide regulation and these
resources could be deployed appropriately in real-time operation
with the modified AGC allocation method.
Next, to investigate the
relationship between the prices of energy and regulation products,
energy and performance-based regulation are obtained simultaneously
in an OPF-based market model considering the participation of
energy storage units. In the proposed market model, the generation
schedule of thermal units, charging and discharging status of
energy storage units and the commitment of regulation resources are
determined. The proposed market model is tested to verify the
validity. The numerical results demonstrate that energy storage
devices could be used to provide both regulation and energy.
With
the implementation of a performance based regulation market,
fast-ramping energy storage units may become price-makers and
manipulate market clearing prices by strategically bidding.
Therefore, a framework to analyze the market power issues from the
perspective of the system operator is proposed. The market power
held by each regulation resource is quantified. Regulation market
power indices are developed to evaluate the market power held by
individual regulation…
Subjects/Keywords: Energy storage
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APA (6th Edition):
Wang, Z. (2017). On some aspects of frequency regulation market design and
analysis. (Doctoral Dissertation). University of Hong Kong. Retrieved from http://hdl.handle.net/10722/241405
Chicago Manual of Style (16th Edition):
Wang, Zhongwei. “On some aspects of frequency regulation market design and
analysis.” 2017. Doctoral Dissertation, University of Hong Kong. Accessed January 24, 2020.
http://hdl.handle.net/10722/241405.
MLA Handbook (7th Edition):
Wang, Zhongwei. “On some aspects of frequency regulation market design and
analysis.” 2017. Web. 24 Jan 2020.
Vancouver:
Wang Z. On some aspects of frequency regulation market design and
analysis. [Internet] [Doctoral dissertation]. University of Hong Kong; 2017. [cited 2020 Jan 24].
Available from: http://hdl.handle.net/10722/241405.
Council of Science Editors:
Wang Z. On some aspects of frequency regulation market design and
analysis. [Doctoral Dissertation]. University of Hong Kong; 2017. Available from: http://hdl.handle.net/10722/241405
Ryerson University
3.
Liu, Rongqiang.
Sensorless speed estimation for long term flywheel energy storage system in standby mode.:.
Degree: 2014, Ryerson University
URL: https://digital.library.ryerson.ca/islandora/object/RULA%3A2665
► A novel technique for sensorless speed estimation is presented in this thesis for squirrel cage induction machine (SCIM) drived long-term flywheel energy storage system (FESS)…
(more)
▼ A novel technique for sensorless speed estimation is presented in this thesis for squirrel cage induction machine (SCIM) drived long-term flywheel
energy storage system (FESS) in standby mode.
The SCIM model for long-term large-capacity FESS is presented. Based on dynamic model , a hybrid rotor flux observer and speed observer are derived. The hybrid rotor flux observer takes advantages of both the current model and voltage model flux observers by seamlessly incorporating these two models together for a better flux estimation performance even at low speed range. The fundamental speed observer is derived from the dynamic model for speed estimation with a fast response time for a tradeoff of the adaptive capabilities.
In order to observe the speed in standby mode, a modified field-oriented control (FOC) scheme is presented. The hybrid flux observer and speed observer are tested in association with the modified FOC. The proposed control technique adopts approaches in an effort to minimize the impact generated by the excitation and speed estimation process to the FESS.
Simulation and experiments are conducted to verify the feasibility of the proposed speed estimation at the standby mode. It is also observed that a step change of excitation current has a significant impact to the existing FESS. A ramp control for excitation current is added to avoid the possible oscillation of the estimated speed and the disturbance to the FESS. The speed estimation settling time is optimized based on the experiment and simulation.
Advisors/Committee Members: Xu, David (Degree supervisor), Ryerson University (Degree grantor).
Subjects/Keywords: Energy storage.; Energy storage. – -; Flywheels.; Flywheels. – -
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APA ·
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APA (6th Edition):
Liu, R. (2014). Sensorless speed estimation for long term flywheel energy storage system in standby mode.:. (Thesis). Ryerson University. Retrieved from https://digital.library.ryerson.ca/islandora/object/RULA%3A2665
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Liu, Rongqiang. “Sensorless speed estimation for long term flywheel energy storage system in standby mode.:.” 2014. Thesis, Ryerson University. Accessed January 24, 2020.
https://digital.library.ryerson.ca/islandora/object/RULA%3A2665.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Liu, Rongqiang. “Sensorless speed estimation for long term flywheel energy storage system in standby mode.:.” 2014. Web. 24 Jan 2020.
Vancouver:
Liu R. Sensorless speed estimation for long term flywheel energy storage system in standby mode.:. [Internet] [Thesis]. Ryerson University; 2014. [cited 2020 Jan 24].
Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A2665.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Liu R. Sensorless speed estimation for long term flywheel energy storage system in standby mode.:. [Thesis]. Ryerson University; 2014. Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A2665
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Ryerson University
4.
Syed, Irtaza Mohammad.
Predictive energy management and control for renewable energy plus battery energy storage systems.
Degree: 2016, Ryerson University
URL: https://digital.library.ryerson.ca/islandora/object/RULA%3A5817
► Renewable energy (RE) is one of the solutions to rising energy demands and growing environmental concerns. However, due to the intrinsic intermittency of RE resources,…
(more)
▼ Renewable energy (RE) is one of the solutions to rising energy demands and growing environmental concerns. However, due to the intrinsic intermittency of RE resources, generated power is irregular and the supplied energy is intermittent. Intermittency renders RE systems non-dispatchable and can cause energy surplus and shortage. RE surplus can translate into curtailment and shortage can cause supply and demand issues. Curtailment wastes RE and supply and demand issues result in loss of load compromising service quality and system reliability.
Battery energy storage system (BESS) is the widely accepted solution to mitigate the negative impacts of intermittency. However, this solution has relied on the conventional energy management and control (EMC) techniques that: 1) cause curtailment, 2) cause supply and demand issues, 3) cannot exploit BESS potential, 4) use RE passively (if and when available), and (5) are suitable only for readily dispatchable generation systems.
This work proposes predictive EMC (PEMC) over conventional EMC (CEMC) to predictively perform EMC of RE systems (photovoltaic (PV) and wind) plus BESS (RE-BESS). PEMC predictively optimizes resources, makes control decisions and manages RE system operations based on the present and future (forecasted) load (or commitments) and RE potential over 24 hours horizon. PEMC 1) minimizes curtailment (maximize RE proportions), 2) minimizes supply and demand issues, 3) exploits BESS potential, 4) uses RE proactively (instead of operating on the mercy of weather), 5) compensates for forecast errors, and 6) maximizes savings (or revenue).
Subjects/Keywords: Renewable energy sources; Storage batteries; Energy storage
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APA (6th Edition):
Syed, I. M. (2016). Predictive energy management and control for renewable energy plus battery energy storage systems. (Thesis). Ryerson University. Retrieved from https://digital.library.ryerson.ca/islandora/object/RULA%3A5817
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Syed, Irtaza Mohammad. “Predictive energy management and control for renewable energy plus battery energy storage systems.” 2016. Thesis, Ryerson University. Accessed January 24, 2020.
https://digital.library.ryerson.ca/islandora/object/RULA%3A5817.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Syed, Irtaza Mohammad. “Predictive energy management and control for renewable energy plus battery energy storage systems.” 2016. Web. 24 Jan 2020.
Vancouver:
Syed IM. Predictive energy management and control for renewable energy plus battery energy storage systems. [Internet] [Thesis]. Ryerson University; 2016. [cited 2020 Jan 24].
Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A5817.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Syed IM. Predictive energy management and control for renewable energy plus battery energy storage systems. [Thesis]. Ryerson University; 2016. Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A5817
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Uppsala University
5.
Östergård, Rickard.
Flywheel energy storage : a conceptucal study.
Degree: Electricity, 2011, Uppsala University
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-164500
► This master thesis was provided by ABB Cooperate Research in Västerås. This study has two major purposes: (1) to identify the characteristics of a…
(more)
▼ This master thesis was provided by ABB Cooperate Research in Västerås. This study has two major purposes: (1) to identify the characteristics of a flywheel energy storage system (FESS), (2) take the first steps in the development of a simulation model of a FESS.
For the first part of this master thesis a literature reviews was conducted with focus on energy storage technologies in general and FESS in particular. The model was developed in the simulation environment PSCAD/EMTDC; with the main purpose to provide working model for future studies of the electrical dynamics of a flywheel energy storage system.
The main conclusion of the literature review was that FESS is a promising energy storage solution; up to multiple megawatt scale. However, few large scale installations have so far been built and it is not a mature technology. Therefore further research and development is needed in multiple areas, including high strength composite materials, magnetic bearings and electrical machines. The model was implemented with the necessary control system and tested in a simulation case showing the operational characteristics.
Subjects/Keywords: Energy storage; Smart Grid; Flywheel energy storage
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APA ·
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Manager
APA (6th Edition):
Östergård, R. (2011). Flywheel energy storage : a conceptucal study. (Thesis). Uppsala University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-164500
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Östergård, Rickard. “Flywheel energy storage : a conceptucal study.” 2011. Thesis, Uppsala University. Accessed January 24, 2020.
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-164500.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Östergård, Rickard. “Flywheel energy storage : a conceptucal study.” 2011. Web. 24 Jan 2020.
Vancouver:
Östergård R. Flywheel energy storage : a conceptucal study. [Internet] [Thesis]. Uppsala University; 2011. [cited 2020 Jan 24].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-164500.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Östergård R. Flywheel energy storage : a conceptucal study. [Thesis]. Uppsala University; 2011. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-164500
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Cambridge
6.
McTigue, Joshua.
Analysis and optimisation of thermal energy storage.
Degree: PhD, 2016, University of Cambridge
URL: https://www.repository.cam.ac.uk/handle/1810/263019
;
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.707782
► The focus of this project is the storage of thermal energy in packed beds for bulk electricity storage applications. Packed beds are composed of pebbles…
(more)
▼ The focus of this project is the storage of thermal energy in packed beds for bulk electricity storage applications. Packed beds are composed of pebbles through which a heat transfer fluid passes, and a thermodynamic model of the heat transfer processes within the store is described. The packed beds are investigated using second law analysis which reveals trade-offs between several heat transfer processes and the importance of various design parameters. Parametric studies of the reservoir behaviour informs the design process and leads to a set of design guidelines. Two innovative design features are proposed and investigated. These features are segmented packed beds and radial-flow packed beds respectively. Thermal reservoirs are an integral component in a storage system known as Pumped Thermal Energy Storage (PTES). To charge, PTES uses a heat pump to create a difference in internal energy between two thermal stores; one hot and one cold. The cycle reverses during discharge with PTES operating as a heat engine. The heat pumps/engines require compression and expansion devices, for which simple models are described and are integrated with the packed bed models. The PTES system behaviour is investigated with parametric studies, and alternative design configurations are explored. A multi-objective genetic algorithm is used to undertake thermo-economic optimisations of packed-bed thermal reservoirs and PTES systems. The algorithm generates a set of optimal designs that illustrate the trade-off between capital cost and round-trip efficiency. Segmentation is found to be particularly beneficial in cold stores, and can add up to 1% to the round-trip efficiency of a PTES system. On the basis of the assumptions made, PTES can achieve efficiencies and energy densities comparable with other bulk electricity storage systems. However, the round-trip efficiency is very sensitive to the efficiency of the compression–expansion system. For designs that utilised bespoke reciprocating compressors and expanders, PTES might be expected to achieve electricity-to-electricity efficiencies of 64%. However, using compression and expansion efficiencies typical of off-theshelf devices the round-trip efficiency is around 45%.
Subjects/Keywords: thermal energy storage
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APA ·
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Manager
APA (6th Edition):
McTigue, J. (2016). Analysis and optimisation of thermal energy storage. (Doctoral Dissertation). University of Cambridge. Retrieved from https://www.repository.cam.ac.uk/handle/1810/263019 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.707782
Chicago Manual of Style (16th Edition):
McTigue, Joshua. “Analysis and optimisation of thermal energy storage.” 2016. Doctoral Dissertation, University of Cambridge. Accessed January 24, 2020.
https://www.repository.cam.ac.uk/handle/1810/263019 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.707782.
MLA Handbook (7th Edition):
McTigue, Joshua. “Analysis and optimisation of thermal energy storage.” 2016. Web. 24 Jan 2020.
Vancouver:
McTigue J. Analysis and optimisation of thermal energy storage. [Internet] [Doctoral dissertation]. University of Cambridge; 2016. [cited 2020 Jan 24].
Available from: https://www.repository.cam.ac.uk/handle/1810/263019 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.707782.
Council of Science Editors:
McTigue J. Analysis and optimisation of thermal energy storage. [Doctoral Dissertation]. University of Cambridge; 2016. Available from: https://www.repository.cam.ac.uk/handle/1810/263019 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.707782
University of Cambridge
7.
McTigue, Joshua.
Analysis and optimisation of thermal energy storage.
Degree: PhD, 2016, University of Cambridge
URL: https://www.repository.cam.ac.uk/handle/1810/263019https://www.repository.cam.ac.uk/bitstream/1810/263019/3/McTigue-2016-PhD.pdf.txt
;
https://www.repository.cam.ac.uk/bitstream/1810/263019/4/McTigue-2016-PhD.pdf.jpg
► The focus of this project is the storage of thermal energy in packed beds for bulk electricity storage applications. Packed beds are composed of pebbles…
(more)
▼ The focus of this project is the storage of thermal energy in packed beds for bulk electricity storage applications. Packed beds are composed of pebbles through which a heat transfer fluid passes, and a thermodynamic model of the heat transfer processes within the store is described. The packed beds are investigated using second law analysis which reveals trade-offs between several heat transfer processes and the importance of various design parameters. Parametric studies of the reservoir behaviour informs the design process and leads to a set of design guidelines. Two innovative design features are proposed and investigated. These features are segmented packed beds and radial-flow packed beds respectively. Thermal reservoirs are an integral component in a storage system known as Pumped Thermal Energy Storage (PTES). To charge, PTES uses a heat pump to create a difference in internal energy between two thermal stores; one hot and one cold. The cycle reverses during discharge with PTES operating as a heat engine. The heat pumps/engines require compression and expansion devices, for which simple models are described and are integrated with the packed bed models. The PTES system behaviour is investigated with parametric studies, and alternative design configurations are explored. A multi-objective genetic algorithm is used to undertake thermo-economic optimisations of packed-bed thermal reservoirs and PTES systems. The algorithm generates a set of optimal designs that illustrate the trade-off between capital cost and round-trip efficiency. Segmentation is found to be particularly beneficial in cold stores, and can add up to 1% to the round-trip efficiency of a PTES system. On the basis of the assumptions made, PTES can achieve efficiencies and energy densities comparable with other bulk electricity storage systems. However, the round-trip efficiency is very sensitive to the efficiency of the compression–expansion system. For designs that utilised bespoke reciprocating compressors and expanders, PTES might be expected to achieve electricity-to-electricity efficiencies of 64%. However, using compression and expansion efficiencies typical of off-theshelf devices the round-trip efficiency is around 45%.
Subjects/Keywords: thermal energy storage
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❌
APA ·
Chicago ·
MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
McTigue, J. (2016). Analysis and optimisation of thermal energy storage. (Doctoral Dissertation). University of Cambridge. Retrieved from https://www.repository.cam.ac.uk/handle/1810/263019https://www.repository.cam.ac.uk/bitstream/1810/263019/3/McTigue-2016-PhD.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/263019/4/McTigue-2016-PhD.pdf.jpg
Chicago Manual of Style (16th Edition):
McTigue, Joshua. “Analysis and optimisation of thermal energy storage.” 2016. Doctoral Dissertation, University of Cambridge. Accessed January 24, 2020.
https://www.repository.cam.ac.uk/handle/1810/263019https://www.repository.cam.ac.uk/bitstream/1810/263019/3/McTigue-2016-PhD.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/263019/4/McTigue-2016-PhD.pdf.jpg.
MLA Handbook (7th Edition):
McTigue, Joshua. “Analysis and optimisation of thermal energy storage.” 2016. Web. 24 Jan 2020.
Vancouver:
McTigue J. Analysis and optimisation of thermal energy storage. [Internet] [Doctoral dissertation]. University of Cambridge; 2016. [cited 2020 Jan 24].
Available from: https://www.repository.cam.ac.uk/handle/1810/263019https://www.repository.cam.ac.uk/bitstream/1810/263019/3/McTigue-2016-PhD.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/263019/4/McTigue-2016-PhD.pdf.jpg.
Council of Science Editors:
McTigue J. Analysis and optimisation of thermal energy storage. [Doctoral Dissertation]. University of Cambridge; 2016. Available from: https://www.repository.cam.ac.uk/handle/1810/263019https://www.repository.cam.ac.uk/bitstream/1810/263019/3/McTigue-2016-PhD.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/263019/4/McTigue-2016-PhD.pdf.jpg
Victoria University of Wellington
8.
Devese, Sam.
Use of a zeolite slurry to increase the charge retention of a low-cost aqueous supercapacitor.
Degree: 2019, Victoria University of Wellington
URL: http://hdl.handle.net/10063/8174
► To increase the viability of renewable energy technology, improvements must be made to existing energy storage devices. One such device is the supercapacitor, which is…
(more)
▼ To increase the viability of renewable
energy technology, improvements must be made to existing
energy storage devices. One such device is the supercapacitor, which is able to store
energy like a battery, but with faster charge-discharge times and increased cyclability. The two main factors limiting the widespread use of supercapacitor technology are the high component cost and high rate of self-discharge. In this project, both of these aspects were addressed, and a supercapacitor was successfully constructed using a carbon black slurry containing zeolitic structures with a pore size of 4 Å to accommodate the electrolyte ions of potassium and chloride.
Low-cost materials and production methods were used to create a supercapacitor with a measured capacitance of 17.25 F g⁻¹ and a coulombic efficiency of 100% determined by galvanostatic charge-discharge curve measurements.
Advisors/Committee Members: Nann, Thomas.
Subjects/Keywords: Energy; Storage; Supercapacitor
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APA (6th Edition):
Devese, S. (2019). Use of a zeolite slurry to increase the charge retention of a low-cost aqueous supercapacitor. (Masters Thesis). Victoria University of Wellington. Retrieved from http://hdl.handle.net/10063/8174
Chicago Manual of Style (16th Edition):
Devese, Sam. “Use of a zeolite slurry to increase the charge retention of a low-cost aqueous supercapacitor.” 2019. Masters Thesis, Victoria University of Wellington. Accessed January 24, 2020.
http://hdl.handle.net/10063/8174.
MLA Handbook (7th Edition):
Devese, Sam. “Use of a zeolite slurry to increase the charge retention of a low-cost aqueous supercapacitor.” 2019. Web. 24 Jan 2020.
Vancouver:
Devese S. Use of a zeolite slurry to increase the charge retention of a low-cost aqueous supercapacitor. [Internet] [Masters thesis]. Victoria University of Wellington; 2019. [cited 2020 Jan 24].
Available from: http://hdl.handle.net/10063/8174.
Council of Science Editors:
Devese S. Use of a zeolite slurry to increase the charge retention of a low-cost aqueous supercapacitor. [Masters Thesis]. Victoria University of Wellington; 2019. Available from: http://hdl.handle.net/10063/8174
Texas A&M University
9.
Abu-Elrub, Ahmad Mohammad Amin.
Planning of a Hybrid Energy System Connected to a Distribution System.
Degree: 2016, Texas A&M University
URL: http://hdl.handle.net/1969.1/158597
► Global warming and excessive use of depletable energy resources are considered as some of the most serious problems that need to be solved. As a…
(more)
▼ Global warming and excessive use of depletable
energy resources are considered as some of the most serious problems that need to be solved. As a response, renewable
energy sources (RES) have been gaining an increasing importance in recent years. The electrical power generated from RES tends to be fluctuating due to intermittency of wind speed and solar radiation which may result in frequency and voltage deviations in the grid as well as loss of the capacity to serve the load. Distributed generation of wind-photovoltaic hybrid systems connected to
energy storage (ES) is proposed to overcome the variability of RES. However, the high cost of the equipment for such systems is also a challenge.
In this dissertation, planning of a hybrid wind-photovoltaic
energy system combined with ES connected to a distribution system is described. The planning procedure is done in two different configurations. In the first one, the objective is to find optimal ES size for a wind farm. The objective function measures the economic benefit gained from selling of the dispatched power to the grid against the cost of ES. The result of the optimization gives the optimal size of ES. A probability distribution function (pdf) is created to represent the optimal size of ES for the planning horizon and then a case study for one year is conducted to illustrate the proposed method. For the second configuration, optimization techniques which use linear programming, two stage stochastic programming and scenario aggregation are deployed in order to find the optimal plan for the hybrid
energy system. The proposed procedure uses historical wind speed, solar radiation,
energy market price, and load data to determine the system design. The objective function measures the total annual cost of the proposed system. The results of the optimization procedure give the optimal size for wind farm, solar farm, and ES needed to meet the load requirements, minimize the annual cost, and consider system uncertainties and system reliability.
Advisors/Committee Members: Singh, Chanan (advisor), Xie, Le (committee member), Kish, Laszlo (committee member), Butenko, Sergiy (committee member).
Subjects/Keywords: hybrid energy system; energy storage
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APA (6th Edition):
Abu-Elrub, A. M. A. (2016). Planning of a Hybrid Energy System Connected to a Distribution System. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/158597
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Abu-Elrub, Ahmad Mohammad Amin. “Planning of a Hybrid Energy System Connected to a Distribution System.” 2016. Thesis, Texas A&M University. Accessed January 24, 2020.
http://hdl.handle.net/1969.1/158597.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Abu-Elrub, Ahmad Mohammad Amin. “Planning of a Hybrid Energy System Connected to a Distribution System.” 2016. Web. 24 Jan 2020.
Vancouver:
Abu-Elrub AMA. Planning of a Hybrid Energy System Connected to a Distribution System. [Internet] [Thesis]. Texas A&M University; 2016. [cited 2020 Jan 24].
Available from: http://hdl.handle.net/1969.1/158597.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Abu-Elrub AMA. Planning of a Hybrid Energy System Connected to a Distribution System. [Thesis]. Texas A&M University; 2016. Available from: http://hdl.handle.net/1969.1/158597
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
UCLA
10.
Zhong, Xing.
In the Investigation of New Materials/Structures and Their Applications in Energy Storage/Conversion Systems.
Degree: Chemistry, 2014, UCLA
URL: http://www.escholarship.org/uc/item/333438bm
► As the need for energy is increasing fast these days, it is imperative to develop new and reliable energy conversion and storage technology strategies that…
(more)
▼ As the need for energy is increasing fast these days, it is imperative to develop new and reliable energy conversion and storage technology strategies that are alternative to the fossil fuels. In the first part of my thesis, we investigate the possibility of utilizing silicon as potential photocatalyst in the organic waste degradation. We first demonstrate that the platinum nanoparticle loaded porous silicon nanowires can be used as effective photocatalysts for photocatalytic degradation of organic dyes and toxic pollutants under visible irradiation. Secondly, we demonstrate a facile and simple solution phase method to enhance and stabilize the photoactivity of silicon nanowires, by functionalizing the silicon nanowires with reduced graphene oxide sheets. Photocatalytic IC dye degradation testing shows that the photoactivity of silicon nanowires can be enhanced and maintained without decay, featured with an initial activation process. In the second part of my thesis, we investigate various high energy density air battery systems. First of all, a silicon-air battery using an alkaline solution as electrolyte is investigated, achieving a high anode specific capacity. Second we demonstrate a new family of silicide based anode materials for high energy density primary air batteries. We show various silicide anodes (Mg2Si, TiSi2, CoSi2 and VSi2) can exhibit excellent electrochemical performance with unparalleled capacity in both thin film and bulk power pellet form. Lastly, we invent a hydrophobic three-dimensional (3D) graphene membrane as a moisture-resistive cathode for high performance Li-air batteries, enabling a robust Li-air battery with exceptional performance. All of these new technology strategies will open up exciting opportunities for many applications in the energy field.
Subjects/Keywords: Chemistry; Energy conversion; Energy Storage
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APA (6th Edition):
Zhong, X. (2014). In the Investigation of New Materials/Structures and Their Applications in Energy Storage/Conversion Systems. (Thesis). UCLA. Retrieved from http://www.escholarship.org/uc/item/333438bm
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Zhong, Xing. “In the Investigation of New Materials/Structures and Their Applications in Energy Storage/Conversion Systems.” 2014. Thesis, UCLA. Accessed January 24, 2020.
http://www.escholarship.org/uc/item/333438bm.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Zhong, Xing. “In the Investigation of New Materials/Structures and Their Applications in Energy Storage/Conversion Systems.” 2014. Web. 24 Jan 2020.
Vancouver:
Zhong X. In the Investigation of New Materials/Structures and Their Applications in Energy Storage/Conversion Systems. [Internet] [Thesis]. UCLA; 2014. [cited 2020 Jan 24].
Available from: http://www.escholarship.org/uc/item/333438bm.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Zhong X. In the Investigation of New Materials/Structures and Their Applications in Energy Storage/Conversion Systems. [Thesis]. UCLA; 2014. Available from: http://www.escholarship.org/uc/item/333438bm
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Arizona State University
11.
Whitcraft, Daniel Scott.
Implementing Load Shifting Using Thermal Energy Ice
Storage.
Degree: Construction, 2016, Arizona State University
URL: http://repository.asu.edu/items/40351
► For decades, load shifting control, one of the most effective peak demand management methods, has attracted attention from both researchers and engineers. Various load shifting…
(more)
▼ For decades, load shifting control, one of the most
effective peak demand management methods, has attracted attention
from both researchers and engineers. Various load shifting controls
have been developed and introduced in mainly commercial buildings.
Utility companies typically penalize consumers with “demand rates”.
This along with increased population and increased customer energy
demand will only increase the need for load shifting. There have
been many white papers, thesis papers and case studies written on
the different types of Thermal Energy Storage and their uses.
Previous papers have been written by Engineers, Manufacturers and
Researchers. This thesis paper is unique because it will be
presented from the application and applied perspective of the
Facilities Manager. There is a need in the field of Facilities
Management for relevant applications. This paper will present and
discuss the methodology, process applications and challenges of
load shifting using (TES) Thermal Energy Storage, mainly ice
storage.
Subjects/Keywords: Sustainability; Energy; Thermal Energy Storage
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Manager
APA (6th Edition):
Whitcraft, D. S. (2016). Implementing Load Shifting Using Thermal Energy Ice
Storage. (Masters Thesis). Arizona State University. Retrieved from http://repository.asu.edu/items/40351
Chicago Manual of Style (16th Edition):
Whitcraft, Daniel Scott. “Implementing Load Shifting Using Thermal Energy Ice
Storage.” 2016. Masters Thesis, Arizona State University. Accessed January 24, 2020.
http://repository.asu.edu/items/40351.
MLA Handbook (7th Edition):
Whitcraft, Daniel Scott. “Implementing Load Shifting Using Thermal Energy Ice
Storage.” 2016. Web. 24 Jan 2020.
Vancouver:
Whitcraft DS. Implementing Load Shifting Using Thermal Energy Ice
Storage. [Internet] [Masters thesis]. Arizona State University; 2016. [cited 2020 Jan 24].
Available from: http://repository.asu.edu/items/40351.
Council of Science Editors:
Whitcraft DS. Implementing Load Shifting Using Thermal Energy Ice
Storage. [Masters Thesis]. Arizona State University; 2016. Available from: http://repository.asu.edu/items/40351
12.
Schweitz, Anders.
The potential of grid energy storage: a case study of the Nordic countries and Germany.
Degree: Energy Systems and Building Technology, 2019, University of Gävle
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-30465
► The increasing share of renewable electricity will make energy storage technologies indispensable in the future. In this study, the potential of grid energy storage…
(more)
▼ The increasing share of renewable electricity will make energy storage technologies indispensable in the future. In this study, the potential of grid energy storage technologies is discussed, focusing on the Nordic countries as well as Germany. It is challenging to balance the intermittency of wind power and solar power production in the energy system. In Norway and Sweden, and to some extent Finland, hydropower is a very important balancing resource. Compressed Air Energy Storage (CAES) is a technology that has not had a real breakthrough yet. There are ongoing projects at different locations where one of the targets is to achieve better round-trip efficiency by taking care of the heat generated at compression. Pumped hydroelectric storage (PHS) has advantages in being cost-efficient and has a high round-trip efficiency. There is probably a high theoretical potential of new generating capacity in Norway and Sweden, but the electricity cost does not vary enough for new developments to be profitable at the moment. The environmental and social impact of PHS plants is an important and difficult aspect to handle. Power-to-gas, power-to-power and hydrogen storage has been getting more attention recently but needs more research to increase the round-trip efficiency and to reduce the costs of electrolysers, storage and fuel cells. Batteries can be well suited as a minute reserve or for peak shaving but are currently not cost-efficient for long-time storage. With lower prices and the possibility of using more abundant metals with less environmental and social impact batteries could play a larger role in electric grids. There might be possibilities of integrating batteries in electric vehicles with power systems as well.To speed up the development of energy storage technologies, governmental subsidies might be necessary. In the future, a larger variation in electricity cost can be expected during different times of the day and the year, which will make energy storage facilities more profitable.
Subjects/Keywords: energy storage; Energy Engineering; Energiteknik
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Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Schweitz, A. (2019). The potential of grid energy storage: a case study of the Nordic countries and Germany. (Thesis). University of Gävle. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-30465
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Schweitz, Anders. “The potential of grid energy storage: a case study of the Nordic countries and Germany.” 2019. Thesis, University of Gävle. Accessed January 24, 2020.
http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-30465.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Schweitz, Anders. “The potential of grid energy storage: a case study of the Nordic countries and Germany.” 2019. Web. 24 Jan 2020.
Vancouver:
Schweitz A. The potential of grid energy storage: a case study of the Nordic countries and Germany. [Internet] [Thesis]. University of Gävle; 2019. [cited 2020 Jan 24].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-30465.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Schweitz A. The potential of grid energy storage: a case study of the Nordic countries and Germany. [Thesis]. University of Gävle; 2019. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-30465
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Waterloo
13.
Kakodkar, Siddharth Atul.
Extensible Modeling of Compressed Air Energy Storage Systems.
Degree: 2018, University of Waterloo
URL: http://hdl.handle.net/10012/13858
► There is a growing number of renewable energy sources that can supply power to the electrical grid. These renewable sources of energy are intermittent in…
(more)
▼ There is a growing number of renewable energy sources that can supply power to the electrical grid.
These renewable sources of energy are intermittent in nature and therefore the transition from using
fossil fuels to green renewables requires the use of energy storage technologies to maintain and
regulate a reliable supply of electricity. Energy storage technologies play a key role in allowing
energy providers to provide a steady supply of electricity by balancing the fluctuations caused by
sources of renewable energy. Compressed Air Energy Storage (CAES) is a promising utility scale
energy storage technology that is suitable for long-duration energy storage and can be used to
integrate renewable energy (such as Wind energy) to the electrical grid. CAES technologies can be
broadly classified into 3 types: Diabatic-CAES (D-CAES), Adiabatic-CAES (A-CAES) and
Isothermal-CAES (I-CAES).
The author first performs a review on the different types of energy storage available today and a
literature review on of CAES system level models, Turbomachinery models, and cavern models.
After the gaps in literature are identified, the author then develops a flexible and extensible model of
an A-CAES system, which can be used a CAES plant designer to obtain a first order thermodynamic
evaluation of a particular plant configuration. The developed model is scalable, modular and can be
connected to a control strategy. The model is able to capture time dependent losses and part load
behavior of turbomachinery. The modeling methodology is focused around keeping the model
extensible, i.e. components and their fidelity can be easily altered for the model’s future growth. The
components modeled are the compressor, the turbine, the induction motor, the generator, and a
thermal energy storage device to the make the CAES plant adiabatic. The model is created using the
Matlab/Simulink® software, which is commonly used tool for modeling.
The A-CAES plant model was simulated for 23.3 hours comprising of 12.47 hours of charging
using a mass flow rate of 107.5 kg/s, 8 hours of storage and 2.83 hours of discharge using a mass
flow rate of 400 kg/s. The maximum and minimum cavern pressures were 72 bar and 42 bar
respectively. The obtained round trip efficiency is 76.24%. Additionally, the turbine start-up time was
found to be 760 seconds. The compressor train average efficiency was calculated as 70%, the
expansion train average efficiency was calculated as 81% and the TES efficiency was calculated as
91%. The models simulated the behavior of an A-CAES plant accurately with the compressor and
turbine showing a close resemblance to their performance maps. The results indicate that Adiabatic-CAES is a promising and emerging technology. However, further research and development is
required beyond this thesis; specifically, in the area of thermal energy storage and management.
Finally, the author makes recommendations on how to further improve upon the achieved objectives
in this work.
Subjects/Keywords: Compressed Air Energy Storage; Grid storage; Energy storage; Renewable energy; Sustainable energy; Cavern; Turbomachinery
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APA (6th Edition):
Kakodkar, S. A. (2018). Extensible Modeling of Compressed Air Energy Storage Systems. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/13858
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Kakodkar, Siddharth Atul. “Extensible Modeling of Compressed Air Energy Storage Systems.” 2018. Thesis, University of Waterloo. Accessed January 24, 2020.
http://hdl.handle.net/10012/13858.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kakodkar, Siddharth Atul. “Extensible Modeling of Compressed Air Energy Storage Systems.” 2018. Web. 24 Jan 2020.
Vancouver:
Kakodkar SA. Extensible Modeling of Compressed Air Energy Storage Systems. [Internet] [Thesis]. University of Waterloo; 2018. [cited 2020 Jan 24].
Available from: http://hdl.handle.net/10012/13858.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kakodkar SA. Extensible Modeling of Compressed Air Energy Storage Systems. [Thesis]. University of Waterloo; 2018. Available from: http://hdl.handle.net/10012/13858
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of California – Berkeley
14.
Xin, Siyuan.
Design, Analysis, and Testing of Large Scale Kinetic Energy Storage Systems.
Degree: Mechanical Engineering, 2015, University of California – Berkeley
URL: http://www.escholarship.org/uc/item/9xn418t5
► AbstractDesign, Analysis, and Testing of Large Capacity Kinetic Energy Storage SystemsbySiyuan XinDoctor of Philosophy in Engineering – Mechanical EngineeringUniversity of California, BerkeleyProfessor David Steigmann, ChairGlobal…
(more)
▼ AbstractDesign, Analysis, and Testing of Large Capacity Kinetic Energy Storage SystemsbySiyuan XinDoctor of Philosophy in Engineering – Mechanical EngineeringUniversity of California, BerkeleyProfessor David Steigmann, ChairGlobal warming, climate change and pollution caused by the traditional energy generation technologies have become some of the biggest threats in today’s world. And the need for more energy is ever increasing. Development of renewable energy, such as solar and wind, as well as distributed smart grids are needed to replace the old energy production methods. Governments have set goals of increasing the proportion of clean energy generation. One major limiting factor of the development of renewable energy is that these energy sources is not as reliable and as stable as the traditional power sources to meet the energy demand. This problem can only be effectively solved by the use of energy storage to store excess power produced by the renewable energy sources. Therefore, energy storage, especially large scale energy storage systems, will be the key factor for enabling renewable energy to become the primary sources of energy. Current energy storage technologies include batteries, flywheel, supercapacitors, pumped hydro, and so on. But due to the issues of capacity, efficiency, life cycles or costs of these current energy storage technologies, a large scale energy storage system that has low cost, long life cycles and high efficiency is yet to be developed to be integrated with renewable energy generation and smart grids. In this work, the design, analysis and tests of large scale flywheel energy storage systems are carried out. The flywheel energy storage system will feature a large steel rotor. Theoretical analysis of the stress distribution of the rotor is discussed to give a parametric view of the key elements in the design. Material testing such as tensile tests, fracture toughness tests, and fatigue crack propagation tests are conducted to characterize the behavior of the rotor material. Finite element method is used to analyze the stress-strain distribution of the rotor in order to optimize the shape of the rotor and determine the rotational speed. Also frequency analysis using finite element method gives the dynamic response of the rotor. Catastrophic failure of the rotor can cause big damages and need to be prevented from happening. And therefore, fracture mechanics is applied to analyze the safety margin and estimate the lifetime of the flywheel system. Post failure analysis is also discussed in case of rotor failure. Energy storage efficiency is a crucial factor in order for the flywheel energy storage system to be applicable. The rotor is kept in low vacuum pressure to minimize aerodynamic drag and improve energy storage efficiency. An analytical model of aerodynamic drag on the rotor is developed. Experimental measurements of drag power loss on a disc rotor inside a controlled vacuum chamber are compared to the predicted results of the analytical model. Design of sub-systems such as bearings…
Subjects/Keywords: Mechanical engineering; Energy; Energy Storage; Flywheel; Kinetic Energy Storage; Rotor
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APA (6th Edition):
Xin, S. (2015). Design, Analysis, and Testing of Large Scale Kinetic Energy Storage Systems. (Thesis). University of California – Berkeley. Retrieved from http://www.escholarship.org/uc/item/9xn418t5
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Xin, Siyuan. “Design, Analysis, and Testing of Large Scale Kinetic Energy Storage Systems.” 2015. Thesis, University of California – Berkeley. Accessed January 24, 2020.
http://www.escholarship.org/uc/item/9xn418t5.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Xin, Siyuan. “Design, Analysis, and Testing of Large Scale Kinetic Energy Storage Systems.” 2015. Web. 24 Jan 2020.
Vancouver:
Xin S. Design, Analysis, and Testing of Large Scale Kinetic Energy Storage Systems. [Internet] [Thesis]. University of California – Berkeley; 2015. [cited 2020 Jan 24].
Available from: http://www.escholarship.org/uc/item/9xn418t5.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Xin S. Design, Analysis, and Testing of Large Scale Kinetic Energy Storage Systems. [Thesis]. University of California – Berkeley; 2015. Available from: http://www.escholarship.org/uc/item/9xn418t5
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Ontario Institute of Technology
15.
Hosseini, Mehdi.
Investigation of energy storage options for sustainable energy systems.
Degree: 2013, University of Ontario Institute of Technology
URL: http://hdl.handle.net/10155/346
► Determination of the possible energy storage options for a specific source of energy requires a thorough analysis from the points of energy, exergy, and exergoeconomics.…
(more)
▼ Determination of the possible
energy storage options for a specific source of
energy requires a thorough analysis from the points of
energy, exergy, and
exergoeconomics. The main objective of this thesis is to investigate
energy storage
options for sustainable
energy systems. A technology description and illustration of
concerns regarding each system is presented. Moreover, the possibility of
implementing each option into different sources of
energy is investigated. Thus,
integrated
energy systems are developed, utilizing
energy storage options with the aim
of achieving more efficient systems.
Energy and exergy analyses are performed for three novel, integrated renewable
energy-based systems.
Energy storage methods investigated here include hydrogen
storage, thermal
energy storage, compressed air
energy storage, and battery. Solar,
wind, and biomass are the
energy sources considered for the integrated systems. In
this research, a discussion on various
energy storage systems is presented, and the
potential of each
storage option in the current and future
energy market is studied.
Each of the integrated systems is described and its operating strategy is presented.
The components of the integrated systems are first modeled to obtain their operating
characteristics. The
energy, exergy, and exergoeconomic equations are applied to the
components to calculate the rates of
energy and exergy flows. The efficiencies are
subsequently calculated. The results of
energy and exergy analyses are combined with
exergoeconomic equations to report the unit exergy cost of flows in the components.
System 1 consists of a PV system, a water electrolyser and a fuel cell to generate
electricity for a house. Hydrogen and thermal
energy storage are considered as the
storage options. The results show that the capacities of the components depend on
weather data and electric power demand. In System 1, the PV electric power output
exceeds demand during months with high-solar irradiance. The results of a case study
based on the weather data in Toronto, Canada, and the electricity demand pattern of a
Canadian house (5.74 kW maximum demand) are presented. The photovoltaic system
capacity and the electrolyser nominal hydrogen production rate are 37.17 kW and 4.5
kg/day, respectively. The economic investigation of the hybrid system reports an
average cost of electricity of 0.84 $/kWh based on 25 years of operation. The optimal nominal capacity of the fuel cell is found to be 1.5 kW, according to the optimization
results. The optimal exergy efficiency varies from 9.91 to 9.94%.
System 2 consists of a wind park, a PV-fuel cell and a biomass-fuel cell-gas
turbine system. This integrated renewable
energy-based system is developed for
baseload power generation and utilizes wind, solar and biomass
energy resources. For
a 64 bar compressed air
storage system, and a 36 bar gas turbine inlet air pressure,
356 wind turbines are required. The lower the pressure difference between the
compressed air in the cavern and the gas…
Advisors/Committee Members: Dincer, Ibrahim.
Subjects/Keywords: Renewable energy; Storage; Solar; Exergy
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Manager
APA (6th Edition):
Hosseini, M. (2013). Investigation of energy storage options for sustainable energy systems. (Thesis). University of Ontario Institute of Technology. Retrieved from http://hdl.handle.net/10155/346
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Hosseini, Mehdi. “Investigation of energy storage options for sustainable energy systems.” 2013. Thesis, University of Ontario Institute of Technology. Accessed January 24, 2020.
http://hdl.handle.net/10155/346.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Hosseini, Mehdi. “Investigation of energy storage options for sustainable energy systems.” 2013. Web. 24 Jan 2020.
Vancouver:
Hosseini M. Investigation of energy storage options for sustainable energy systems. [Internet] [Thesis]. University of Ontario Institute of Technology; 2013. [cited 2020 Jan 24].
Available from: http://hdl.handle.net/10155/346.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Hosseini M. Investigation of energy storage options for sustainable energy systems. [Thesis]. University of Ontario Institute of Technology; 2013. Available from: http://hdl.handle.net/10155/346
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Texas A&M University
16.
Shankar, Sandhya.
Thermal cycling effect on the nanoparticle distribution and specific heat of a carbonate eutectic with alumina nanoparticles.
Degree: 2011, Texas A&M University
URL: http://hdl.handle.net/1969.1/ETD-TAMU-2011-05-9483
► The objective of this research was to measure the effect of thermal cycling on the nanoparticle distribution and specific heat of a nanocomposite material consisting…
(more)
▼ The objective of this research was to measure the effect of thermal cycling on the nanoparticle distribution and specific heat of a nanocomposite material consisting of a eutectic of lithium carbonate and potassium carbonate and 1% by mass alumina nanoparticles. The material was subjected to thermal cycling in a stainless steel tube using a temperature controlled furnace. After thermal cycling, the stainless steel tube was sectioned into three equal parts ? top, middle and bottom. Composite material samples were taken from the central region and near the wall region of each section.
The specific heat of this material in the temperature range of 290?C-397?C was measured using the Modulated Differential Scanning Calorimeter (MDSC) method. The concentration of alumina nanoparticles in this material was measured using neutron activation analysis. The average specific heat of the uncycled material was found to be 1.37 J/g?C.The average specific heat of the thermally cycled material was between 1.7-2.1 J/g?C. It was found that the concentration of the nanoparticle varied along the height of the sample tube. The nanoparticles tended to settle towards the bottom of the tube with thermal cycling. There was also migration of nanoparticles towards the wall of the sample tube with thermal cycling. Despite these gross movements of nanoparticles, there was no significant change in the specific heat of the nanocomposite due to thermal cycling.
Advisors/Committee Members: Lalk, Thomas (advisor), Lau, Sai (advisor), Schuller, Michael (committee member).
Subjects/Keywords: Thermal energy storage; Specific heat
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APA (6th Edition):
Shankar, S. (2011). Thermal cycling effect on the nanoparticle distribution and specific heat of a carbonate eutectic with alumina nanoparticles. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2011-05-9483
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Shankar, Sandhya. “Thermal cycling effect on the nanoparticle distribution and specific heat of a carbonate eutectic with alumina nanoparticles.” 2011. Thesis, Texas A&M University. Accessed January 24, 2020.
http://hdl.handle.net/1969.1/ETD-TAMU-2011-05-9483.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Shankar, Sandhya. “Thermal cycling effect on the nanoparticle distribution and specific heat of a carbonate eutectic with alumina nanoparticles.” 2011. Web. 24 Jan 2020.
Vancouver:
Shankar S. Thermal cycling effect on the nanoparticle distribution and specific heat of a carbonate eutectic with alumina nanoparticles. [Internet] [Thesis]. Texas A&M University; 2011. [cited 2020 Jan 24].
Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-05-9483.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Shankar S. Thermal cycling effect on the nanoparticle distribution and specific heat of a carbonate eutectic with alumina nanoparticles. [Thesis]. Texas A&M University; 2011. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-05-9483
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Penn State University
17.
Li, Junjun.
NANOCOMPOSITES BASED ON FERROELECTRIC POLYMERS FOR
ELECTRICAL ENERGY STORAGE.
Degree: MS, Materials Science and Engineering, 2009, Penn State University
URL: https://etda.libraries.psu.edu/catalog/10019
► Poly (vinylidene fluoride) (PVDF)-based ferroelectric polymers exhibit much higher electrical energy storage capability than other linear dielectric polymers. These ferroelectric polymers, therefore, find the most…
(more)
▼ Poly (vinylidene fluoride) (PVDF)-based ferroelectric
polymers exhibit much higher electrical energy storage capability
than other linear dielectric polymers. These ferroelectric
polymers, therefore, find the most promise in manufacturing
advanced electronic devices and electric power systems with reduced
weight, size, and cost. Polymer-based capacitor technology has the
advantages of high energy density, low dielectric loss, easy
processing, and good flexibility. In order to further improve and
tailor the energy storage capability, carefully selected inorganic
nanoparticles are incorporated into polymer matrices. Structural
and dielectric properties of the resulting nanocomposites have been
examined. Firstly, high dielectric constant BaTiO3 nanoparticles,
whose surface were functionalized by ethylene diamine, were used as
dopant to prepare nanocomposite with poly (vinylidene
fluoride-chlorotrifluoroethylene) [P(VDF-CTFE)] and poly
(vinylidene fluoride-trifluoroethylene-chlorotrifluoroethylene)
[P(VDF-TrFE-CTFE)]. The morphology, crystalline structure, and
dielectric responses were revealed in dependence on the loading of
BaTiO3 and selection of polymer matrices. It was concluded that the
polymer matrices play a decisive role in determining the energy
density of nanocomposites. To obviate the negative influence of
dielectric contrast, polymer nanocomposites were then fabricated
based on surface-functionalized TiO2 nanoparticles dispersed in a
ferroelectric P(VDF-TrFE-CTFE). TiO2 nanoparticles with barium
hydroxide (Ba-OH) as surface modifier possess dielectric
permittivity of 47, comparable to that of P(VDF-TrFE-CTFE) around
42, were uniformly dispersed in polymer matrix with limited
aggregation. The resultant nanocomposites revealed a large
enhancement in polarization response at high electric fields and
hence the energy density, which might be attributed to the change
in polymer microstructure induced by the nano-fillers as well as
the interfacial effect. To eliminate the adverse influence of
surfactant on the overall dielectric properties, “Graft to” method
was also utilized to fabricate polymer nanocomposites. Phosphonic
acid group, which is proven to attach to metal oxide surface
firmly, was introduced as end functional group of P(VDF-CTFE) by
free radical polymerization initiated by a functional benzoyl
peroxide (BPO) with phosphonate group followed by transformation of
phosphonate to phosphonic acid. The phosphonic acid end-groups were
grafted onto the surface of ZrO2 nanoparticles. Comprehensive
structural, morphological, thermal, and dielectric studies were
conducted on the resultant nanocomposites.
Subjects/Keywords: nanocomposite; ferroelectric; PVDF; energy
storage
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APA ·
Chicago ·
MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Li, J. (2009). NANOCOMPOSITES BASED ON FERROELECTRIC POLYMERS FOR
ELECTRICAL ENERGY STORAGE. (Masters Thesis). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/10019
Chicago Manual of Style (16th Edition):
Li, Junjun. “NANOCOMPOSITES BASED ON FERROELECTRIC POLYMERS FOR
ELECTRICAL ENERGY STORAGE.” 2009. Masters Thesis, Penn State University. Accessed January 24, 2020.
https://etda.libraries.psu.edu/catalog/10019.
MLA Handbook (7th Edition):
Li, Junjun. “NANOCOMPOSITES BASED ON FERROELECTRIC POLYMERS FOR
ELECTRICAL ENERGY STORAGE.” 2009. Web. 24 Jan 2020.
Vancouver:
Li J. NANOCOMPOSITES BASED ON FERROELECTRIC POLYMERS FOR
ELECTRICAL ENERGY STORAGE. [Internet] [Masters thesis]. Penn State University; 2009. [cited 2020 Jan 24].
Available from: https://etda.libraries.psu.edu/catalog/10019.
Council of Science Editors:
Li J. NANOCOMPOSITES BASED ON FERROELECTRIC POLYMERS FOR
ELECTRICAL ENERGY STORAGE. [Masters Thesis]. Penn State University; 2009. Available from: https://etda.libraries.psu.edu/catalog/10019
University of Ottawa
18.
Lefebvre, Dominique.
Thermal Energy Storage Using Adsorption Processes for Solar and Waste Heat Applications: Material Synthesis, Testing and Modeling
.
Degree: 2016, University of Ottawa
URL: http://hdl.handle.net/10393/34173
► As the worldwide energy demand continues to increase, scientists and engineers are faced with the increasingly difficult task of meeting these needs. Currently, the major…
(more)
▼ As the worldwide energy demand continues to increase, scientists and engineers are faced with the increasingly difficult task of meeting these needs. Currently, the major energy sources, consisting of oil, coal, and natural gas, are non-renewable, contribute to climate change, and are rapidly depleting. Renewable technology research has become a major focus to provide energy alternatives which are environmentally-friendly and economically competitive to sustain the future worldwide needs. Thermal energy storage using adsorption is a promising technology which can provide energy for heating and cooling applications using solar and waste heat sources. The current work aims to improve adsorption systems to provide higher energy outputs and therefore, more economical systems. New adsorbents and operating conditions were tested with the goal of storing the available energy more efficiently. A model was also developed to gain a better understanding of the adsorption system to improve this developing technology.
Subjects/Keywords: Thermal energy storage;
Adsorption
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❌
APA ·
Chicago ·
MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Lefebvre, D. (2016). Thermal Energy Storage Using Adsorption Processes for Solar and Waste Heat Applications: Material Synthesis, Testing and Modeling
. (Thesis). University of Ottawa. Retrieved from http://hdl.handle.net/10393/34173
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Lefebvre, Dominique. “Thermal Energy Storage Using Adsorption Processes for Solar and Waste Heat Applications: Material Synthesis, Testing and Modeling
.” 2016. Thesis, University of Ottawa. Accessed January 24, 2020.
http://hdl.handle.net/10393/34173.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Lefebvre, Dominique. “Thermal Energy Storage Using Adsorption Processes for Solar and Waste Heat Applications: Material Synthesis, Testing and Modeling
.” 2016. Web. 24 Jan 2020.
Vancouver:
Lefebvre D. Thermal Energy Storage Using Adsorption Processes for Solar and Waste Heat Applications: Material Synthesis, Testing and Modeling
. [Internet] [Thesis]. University of Ottawa; 2016. [cited 2020 Jan 24].
Available from: http://hdl.handle.net/10393/34173.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Lefebvre D. Thermal Energy Storage Using Adsorption Processes for Solar and Waste Heat Applications: Material Synthesis, Testing and Modeling
. [Thesis]. University of Ottawa; 2016. Available from: http://hdl.handle.net/10393/34173
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Drexel University
19.
Pérez, Carlos Raúl.
High Power Electric Double-Layer Capacitors based on Room-Temperature Ionic Liquids and Nanostructured Carbons.
Degree: 2013, Drexel University
URL: http://hdl.handle.net/1860/4209
► The efficient storage of electrical energy constitutes both a fundamental challenge for 21st century science and an urgent requirement for the sustainability of our technological…
(more)
▼ The efficient storage of electrical energy constitutes both a fundamental challenge for 21st century science and an urgent requirement for the sustainability of our technological civilization. The push for cleaner renewable forms of energy production, such as solar and wind power, strongly depends on a concomitant development of suitable storage methods to pair with these intermittent sources, as well as for mobile applications, such as vehicles and personal electronics. In this regard, Electrochemical Double-Layer Capacitors (supercapacitors) represent a vibrant area of research due to their environmental friendliness, long lifetimes, high power capability, and relative underdevelopment when compared to electrochemical batteries.Currently supercapacitors have gravimetric energies one order of magnitude lower than similarly advanced batteries, while conversly enjoying a similar advantage over them in terms of power. The challenge is to increase the gravimentric energies and conserve the high power. On the material side, research focuses on highly porous supports and electrolytes, the critical components of supercapacitors. Through the use of electrolyte systems with a wider electrochemical stability window, as well as properly tailored carbon nanomaterials as electrodes, significant improvements in performance are possible. Room Temperature Ionic Liquids and Carbide-Derived Carbons are promising electrolytes and electrodes, respectively. RTILs have been shown to be stable at up to twice the voltage of organic solvent-salt systems currently employed in supercapacitors, and CDCs are tunable in pore structure, show good electrical conductivity, and superior demonstrated capability as electrode material.This work aims to better understand the interplay of electrode and electrolyte parameters, such as pore structure and ion size, in the ultimate performance of RTIL-based supercapacitors in terms of power, energy, and temperature of operation. For this purpose, carbon nanomaterials such as nanoporous CDC nanopowders, vertically aligned carbon nanotube arrays, and single wall carbon nanotube aerogels, were synthesized and used as electrodes, alongside RTIL electrolytes with systematically varying ion sizes and compositions. While electrode/electrolyte development can take place along parallel lines, both must be properly matched to the devices ultimate operating conditions and specific application. The resulting devices exhibit good performance characteristics, and the best temperature range of any electrochemical storage device to date.
Ph.D., Materials Science and Engineering – Drexel University, 2013
Advisors/Committee Members: Gogotsi, Yury G., 1961-.
Subjects/Keywords: Materials science; Carbides; Energy storage
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APA ·
Chicago ·
MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Pérez, C. R. (2013). High Power Electric Double-Layer Capacitors based on Room-Temperature Ionic Liquids and Nanostructured Carbons. (Thesis). Drexel University. Retrieved from http://hdl.handle.net/1860/4209
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Pérez, Carlos Raúl. “High Power Electric Double-Layer Capacitors based on Room-Temperature Ionic Liquids and Nanostructured Carbons.” 2013. Thesis, Drexel University. Accessed January 24, 2020.
http://hdl.handle.net/1860/4209.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Pérez, Carlos Raúl. “High Power Electric Double-Layer Capacitors based on Room-Temperature Ionic Liquids and Nanostructured Carbons.” 2013. Web. 24 Jan 2020.
Vancouver:
Pérez CR. High Power Electric Double-Layer Capacitors based on Room-Temperature Ionic Liquids and Nanostructured Carbons. [Internet] [Thesis]. Drexel University; 2013. [cited 2020 Jan 24].
Available from: http://hdl.handle.net/1860/4209.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Pérez CR. High Power Electric Double-Layer Capacitors based on Room-Temperature Ionic Liquids and Nanostructured Carbons. [Thesis]. Drexel University; 2013. Available from: http://hdl.handle.net/1860/4209
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Drexel University
20.
Dall'Agnese, Yohan.
Study of Early Transition Metal Carbides for Energy Storage Applications.
Degree: 2016, Drexel University
URL: http://hdl.handle.net/1860/idea:6657
► An increase in energy and power density is needed to match the growing energy storage demands linked with the development of renewable energy production, and…
(more)
▼ An increase in energy and power density is needed to match the growing energy storage demands linked with the development of renewable energy production, and portable electronics. Several energy storage technologies exist including lithium-ion batteries, sodium-ion batteries, fuel cells and supercapacitors. These systems are mutually complementary. For example, supercapacitors can deliver high power densities whereas batteries can be used for high energy density applications. The first objective of this work was to investigate the electrochemical performances of a new family of 2-D materials called MXenes by cyclic voltammetry and galvanostatic charge-discharge measurements and to propose new solutions to tackle the energy storage concern. To achieve this goal, several directions have been explored. The first part of the research focused on Ti3C2-based MXenes behavior as electrode materials for supercapacitors in aqueous electrolytes. The charge storage mechanisms in basic and neutral aqueous electrolytes, investigated by X-ray diffraction, were demonstrated to be attributed to cations intercalation between Ti3C2 layers. X-ray photoelectron spectroscopy highlighted the contribution of oxygenated functional groups on surface redox reactions in sulfuric acid. High capacitances were achieved, up to 520 F/cm3 and 325 F/g. Then the electrochemical behaviors of MXenes in sodium-based organic electrolytes were explored. A new hybrid system of sodium-ion capacitor was proposed. It was demonstrated that V2C-based MXene electrodes were suitable to be used as positive electrodes with an operating potential from 1 V to 3.5 V vs. Na+/Na. Continuous intercalation and de-intercalation of sodium ions between the V2C layers during sodiation and desodiation were showed by X-ray diffraction. An asymmetric sodium-ion capacitor full cell was assembled using hard carbon as negative electrode and showed promising results, with a capacity of 50 mAh/g. The last part was focused on the study of MXene electrodes for supercapacitors in an organic electrolyte; 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (EMITFSI) in acetonitrile. High volumetric capacitances, up to 245 F/cm3, were achieved by using carbon nanotubes as an additive to improve ion accessibility to Ti3C2 layers. The redox intercalation of large EMI+ cations between Ti3C2 layers at -0.4 V vs. Ag was observed by X-ray diffraction.
Ph.D., Materials Science and Engineering – Drexel University, 2016
Advisors/Committee Members: Gogotsi, Yury, Simon, Patrice.
Subjects/Keywords: Materials science; Energy storage; MXenes
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APA ·
Chicago ·
MLA ·
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CSE |
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to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Dall'Agnese, Y. (2016). Study of Early Transition Metal Carbides for Energy Storage Applications. (Thesis). Drexel University. Retrieved from http://hdl.handle.net/1860/idea:6657
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Dall'Agnese, Yohan. “Study of Early Transition Metal Carbides for Energy Storage Applications.” 2016. Thesis, Drexel University. Accessed January 24, 2020.
http://hdl.handle.net/1860/idea:6657.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Dall'Agnese, Yohan. “Study of Early Transition Metal Carbides for Energy Storage Applications.” 2016. Web. 24 Jan 2020.
Vancouver:
Dall'Agnese Y. Study of Early Transition Metal Carbides for Energy Storage Applications. [Internet] [Thesis]. Drexel University; 2016. [cited 2020 Jan 24].
Available from: http://hdl.handle.net/1860/idea:6657.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Dall'Agnese Y. Study of Early Transition Metal Carbides for Energy Storage Applications. [Thesis]. Drexel University; 2016. Available from: http://hdl.handle.net/1860/idea:6657
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Drexel University
21.
Heon, Min.
Carbide-derived carbon films for integrated electrochemical energy storage.
Degree: 2014, Drexel University
URL: http://hdl.handle.net/1860/idea:6029
► Active RFID tags, which can communicate over tens or even hundreds of meters, MEMS devices of several microns in size, which are designed for the…
(more)
▼ Active RFID tags, which can communicate over tens or even hundreds of meters, MEMS devices of several microns in size, which are designed for the medical and pharmaceutical purposes, and sensors working in wireless monitoring systems, require microscale power sources that are able to provide enough energy and to satisfy the peak power demands in those applications. Supercapacitors have not been an attractive candidate for micro-scale energy storage, since most nanoporous carbon electrode materials are not compatible with micro-fabrication techniques and have failed to meet the requirements of high volumetric energy density and small form factor for power supplies for integrated circuits or microelectronic devices or sensors. However, supercapacitors can provide high power density, because of fast charging/discharging, which can enable self-sustaining micro-modules when combined with energy-harvesting devices, such as solar cell, piezoelectric or thermoelectric micro-generators.
In this study, carbide-derived carbon (CDC) films were synthesized via vacuum decomposition of carbide substrates and gas etching of sputtered carbide thin films. This approach allowed manufacturing of porous carbon films on SiC and silicon substrates. CDC films were studied for micro-supercapacitor electrodes, and showed good double layer capacitance. Since the gas etching technique is compatible with conventional micro-device fabrication processes, it can be implemented to manufacture integrated on-chip supercapacitors on silicon wafers.
Ph.D., Materials Science – Drexel University, 2014
Advisors/Committee Members: Gogot︠s︡i,, I︠U︡. G..
Subjects/Keywords: Materials science; Energy storage; Supercapacitors
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❌
APA ·
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Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Heon, M. (2014). Carbide-derived carbon films for integrated electrochemical energy storage. (Thesis). Drexel University. Retrieved from http://hdl.handle.net/1860/idea:6029
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Heon, Min. “Carbide-derived carbon films for integrated electrochemical energy storage.” 2014. Thesis, Drexel University. Accessed January 24, 2020.
http://hdl.handle.net/1860/idea:6029.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Heon, Min. “Carbide-derived carbon films for integrated electrochemical energy storage.” 2014. Web. 24 Jan 2020.
Vancouver:
Heon M. Carbide-derived carbon films for integrated electrochemical energy storage. [Internet] [Thesis]. Drexel University; 2014. [cited 2020 Jan 24].
Available from: http://hdl.handle.net/1860/idea:6029.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Heon M. Carbide-derived carbon films for integrated electrochemical energy storage. [Thesis]. Drexel University; 2014. Available from: http://hdl.handle.net/1860/idea:6029
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Drexel University
22.
Dennison, Christopher R.
The Electrochemical Flow Capacitor: Capacitive Energy Storage in Flowable Media.
Degree: 2014, Drexel University
URL: http://hdl.handle.net/1860/idea:6091
► Electrical energy storage (EES) has emerged as a necessary aspect of grid infrastructure to address the increasing problem of grid instability imposed by the large…
(more)
▼ Electrical energy storage (EES) has emerged as a necessary aspect of grid infrastructure to address the increasing problem of grid instability imposed by the large scale implementation of renewable energy sources (such as wind or solar) on the grid. Rapid energy recovery and storage is critically important to enable immediate and continuous utilization of these resources, and provides other benefits to grid operators and consumers as well. In past decades, there has been significant progress in the development of electrochemical EES technologies which has had an immense impact on the consumer and micro-electronics industries. However, these advances primarily address small-scale storage, and are often not practical at the grid-scale.
A new energy storage concept called "the electrochemical flow capacitor (EFC)" has been developed at Drexel which has significant potential to be an attractive technology for grid-scale energy storage. This new concept exploits the characteristics of both supercapacitors and flow batteries, potentially enabling fast response rates with high power density, high efficiency, and long cycle lifetime, while decoupling energy storage from power output (i.e., scalable energy storage capacity). The unique aspect of this concept is the use of flowable carbon-electrolyte slurry ("flowable electrode") as the active material for capacitive energy storage.
This dissertation work seeks to lay the scientific groundwork necessary to develop this new concept into a practical technology, and to test the overarching hypothesis that energy can be capacitively stored and recovered from a flowable media. In line with these goals, the objectives of this Ph.D. work are to: i) perform an exploratory investigation of the operating principles and demonstrate the technical viability of this new concept and ii) establish a scientific framework to assess the key linkages between slurry composition, flow cell design, operating conditions and system performance. To achieve these goals, a combined experimental and computational approach is undertaken. The technical viability of the technology is demonstrated, and in-depth studies are performed to understand the coupling between flow rate and slurry conductivity, and localized effects arising within the cell. The outlook of EFCs and other flowable electrode technologies is assessed, and opportunities for future work are discussed.
Ph.D., Mechanical engineering – Drexel University, 2014
Advisors/Committee Members: Kumbur, Emin Caglan.
Subjects/Keywords: Mechanical engineering; Energy storage; Capacitors
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APA ·
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Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Dennison, C. R. (2014). The Electrochemical Flow Capacitor: Capacitive Energy Storage in Flowable Media. (Thesis). Drexel University. Retrieved from http://hdl.handle.net/1860/idea:6091
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Dennison, Christopher R. “The Electrochemical Flow Capacitor: Capacitive Energy Storage in Flowable Media.” 2014. Thesis, Drexel University. Accessed January 24, 2020.
http://hdl.handle.net/1860/idea:6091.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Dennison, Christopher R. “The Electrochemical Flow Capacitor: Capacitive Energy Storage in Flowable Media.” 2014. Web. 24 Jan 2020.
Vancouver:
Dennison CR. The Electrochemical Flow Capacitor: Capacitive Energy Storage in Flowable Media. [Internet] [Thesis]. Drexel University; 2014. [cited 2020 Jan 24].
Available from: http://hdl.handle.net/1860/idea:6091.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Dennison CR. The Electrochemical Flow Capacitor: Capacitive Energy Storage in Flowable Media. [Thesis]. Drexel University; 2014. Available from: http://hdl.handle.net/1860/idea:6091
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of North Texas
23.
Hasib, A. M. M. Golam.
Effect of Dispersed Particles and Branching on the Performance of a Medium Temperature Thermal Energy Storage System.
Degree: 2013, University of North Texas
URL: https://digital.library.unt.edu/ark:/67531/metadc499995/
► The main objective of my thesis is to develop a numerical model for small-scale thermal energy storage system and to see the effect of dispersing…
(more)
▼ The main objective of my thesis is to develop a numerical model for small-scale thermal
energy storage system and to see the effect of dispersing nano-particles and using fractal-like branching heat exchanger in phase change material for our proposed thermal
energy storage system. The associated research problems investigated for phase change material (PCM) are the low thermal conductivity and low rate of heat transfer from heat transfer fluid to PCM in thermal
energy storage system. In this study an intensive study is carried out to find the best material for thermal
storage and later on as a high conductive nano-particle graphite is used to enhance the effective thermal conductivity of the mixed materials. As a thermal
storage material molten solar Salt (60% NaNO3+40%KNO3) has been selected, after that detailed numerical modeling of the proposed design has been done using MATLAB algorithm and following the fixed grid enthalpy method. The model is based on the numerical computation of 1-D finite difference method using explicit scheme. The second part of the study is based on enhancing the heat transfer performance by introducing the concept of fractal network or branching heat exchanger. Results from the numerical computation have been utilized for the comparison between a conventional heating system (with a simple single tube as a heat exchanger) and a passive PCM thermal
energy storage system with branching heat exchanger using NTU-effectiveness method and charging time calculation. The comparison results show a significant amount improvement using branching network and mixing nano-particle in terms of heat transfer (13.5% increase in effectiveness of branching level-02 heat exchangers from the conventional one ), thermal conductivity (increased 73.6% with 20% graphite nano-particle mix with solid PCM), charging time (57% decrease of charging time for the effect of both the dispersion of Graphite nano-particle and branching heat exchange) and pressure drop (36% decrease in level-02 branching). The results of this study prove that the proposed medium temperature TES system coupled with solar ORC can be the stepping-stone for
energy efficient and sustainable future in small-scale/building level as the system proves to be better in terms of enhanced heat transfer, increased thermal conductivity and reduced pumping power and overall sustainability.
Advisors/Committee Members: Tao, Yong, Burzo, Mihai, Rayegan, Rambod.
Subjects/Keywords: Energy storage; branching; dispersed particles
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University of Illinois – Chicago
24.
Zhang, Chengji.
Study on Performance Enhancement of Lithium-Oxygen Batteries.
Degree: 2017, University of Illinois – Chicago
URL: http://hdl.handle.net/10027/22236
► The electrification of transportation is well-recognized as alternative strategies to minimize the dependence on fossil fuels and eventually address the effects on Climate change. Among…
(more)
▼ The electrification of transportation is well-recognized as alternative strategies to minimize the dependence on fossil fuels and eventually address the effects on Climate change. Among all strong candidate for the next generation
energy storage technology, the lithium-air battery has attracted exclusively attention in terms of its high theoretical
energy density, which is even comparable to gasoline combustion. And as a result, makes it promise for powering the fully battery powered Electric Vehicles (EVs). However, the high overpotential while redox reaction happens between charge and discharge is the enormous challenges obstructed the way to success. On the other hand, electrolyte and electrode decomposition was almost inevitable as the battery keeps cycling and eventually leads to cathode clogging which is in responsible for poor
energy efficiency as well as limited cyclability after testing.
In this research, in order to achieve highly desirable battery developments, we first introduce Ir3Li, a lithium intermetallic, as new catalyst material that helps stabilize the formation of LiO2, a meta-stable intermediate product instead of the commonly reported Li2O2 after discharge, and as a result mechanically reducing the
energy barrier. In addition, the way to fabricate improved carbon black cathode and other performance perfection technique were also investigated. Different characterization techniques including SEM, Raman, and titration will be employed to investigate the morphology as well as the distribution of redox products. Along with battery cycling test, which helps better understand the two-step mechanism of the Li-Oxygen battery system.
With the help of all these characterization and justification, an improved Li-O2 cell will be presented with an
energy efficiency of 70% for more than 70 cycles with only moderate capacity loss. At the same time, the discharge products are believed to be Lithium superoxide as wanted instead of Lithium peroxide. As a result, the improved Li-O2 battery has been successfully explored that could keep running continuously for more than eight weeks.
Advisors/Committee Members: Indacochea, Ernesto J. (advisor), Wang, Hsien-Hau (advisor), McNallan, Michael J. (committee member), Indacochea, Ernesto J. (chair).
Subjects/Keywords: energy storage; Li-O2 battery
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APA (6th Edition):
Zhang, C. (2017). Study on Performance Enhancement of Lithium-Oxygen Batteries. (Thesis). University of Illinois – Chicago. Retrieved from http://hdl.handle.net/10027/22236
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Zhang, Chengji. “Study on Performance Enhancement of Lithium-Oxygen Batteries.” 2017. Thesis, University of Illinois – Chicago. Accessed January 24, 2020.
http://hdl.handle.net/10027/22236.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Zhang, Chengji. “Study on Performance Enhancement of Lithium-Oxygen Batteries.” 2017. Web. 24 Jan 2020.
Vancouver:
Zhang C. Study on Performance Enhancement of Lithium-Oxygen Batteries. [Internet] [Thesis]. University of Illinois – Chicago; 2017. [cited 2020 Jan 24].
Available from: http://hdl.handle.net/10027/22236.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Zhang C. Study on Performance Enhancement of Lithium-Oxygen Batteries. [Thesis]. University of Illinois – Chicago; 2017. Available from: http://hdl.handle.net/10027/22236
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of New South Wales
25.
Lin, Yunhui.
Three-dimensional graphene based material for electrochemical energy.
Degree: Chemical Engineering, 2019, University of New South Wales
URL: http://handle.unsw.edu.au/1959.4/62680
;
https://unsworks.unsw.edu.au/fapi/datastream/unsworks:58915/SOURCE02?view=true
► Graphene has received extensive attention since its discovery due to its unique structure and numerous excellent properties such as good mechanical property, excellent conductivity and…
(more)
▼ Graphene has received extensive attention since its discovery due to its unique structure and numerous excellent properties such as good mechanical property, excellent conductivity and high surface area. Three dimensional (3D) graphene based materials is interesting in the electrochemical
energy storage as the 3D architectures assemble graphene nanosheets into macroscopic for practical applications providing fundamental frameworks with more “space” for loading inorganic nanoparticles or organic or biologic molecules. This thesis is based on the 3D graphene martial assembling from the graphene oxide (GO) which is a kind of graphene derivative with rich oxygen functional groups and good hydrophilic property.In the first part, we developed a green and simple method to form the reduced graphene oxide (rGO) hydrogel by mixing the GO and zinc nanoparticles dispersions under ambient conditions. The relative negative standard electrode potential of Zn to GO allowed the spontaneous formation of rGO-nanoZn hydrogel. Zn-free 3D rGO sponges were obtained by acid leaching of Zn species and followed by freeze drying. The result shows that such rGO hydrogel can be used as the material for the electrode of supercapacitor.Following this finding, we developed the compressed Zinc/graphene sponge where the Zinc nanoparticles are wrapped and stabilised inside the rGO sheets. Such material can be used as the dendrite-free electrode for the Zn metal batteries to improve the cycling stability of alkaline rechargeable zinc based batteries. In comparison with Zn plate and the mixture of Zn nanoparticles and carbon black, the compressed rGO-nanoZn sponge achieved better cycling performance with suppressed dendrite formation, which is attributed to the strong interconnection of Zn nanoparticles and rGO sheets.The last section is to improve the volumetric capacity by simply pressing fluffy rGO sponge into dense film. It is known that pure rGO sponges are generally delicate and fragile, which is hard to handle and process. Here, we improve the mechanical integrity of rGO sponges by introducing the poly acrylic acid (PAA), thus it could be pressed in to freestanding integral film. The addition of carbon nanotube (CNT) could enhance the conductivity and prevent the sharp decline of surface area by pi-pi interaction between CNT and rGO sheets from the restacking problem.
Advisors/Committee Members: Wang, Da-Wei, Chemical Engineering, Faculty of Engineering, UNSW, Boyer, Cyrille, Chemical Engineering, Faculty of Engineering, UNSW.
Subjects/Keywords: Energy storage; Three-dimensional; Graphene
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APA (6th Edition):
Lin, Y. (2019). Three-dimensional graphene based material for electrochemical energy. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/62680 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:58915/SOURCE02?view=true
Chicago Manual of Style (16th Edition):
Lin, Yunhui. “Three-dimensional graphene based material for electrochemical energy.” 2019. Doctoral Dissertation, University of New South Wales. Accessed January 24, 2020.
http://handle.unsw.edu.au/1959.4/62680 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:58915/SOURCE02?view=true.
MLA Handbook (7th Edition):
Lin, Yunhui. “Three-dimensional graphene based material for electrochemical energy.” 2019. Web. 24 Jan 2020.
Vancouver:
Lin Y. Three-dimensional graphene based material for electrochemical energy. [Internet] [Doctoral dissertation]. University of New South Wales; 2019. [cited 2020 Jan 24].
Available from: http://handle.unsw.edu.au/1959.4/62680 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:58915/SOURCE02?view=true.
Council of Science Editors:
Lin Y. Three-dimensional graphene based material for electrochemical energy. [Doctoral Dissertation]. University of New South Wales; 2019. Available from: http://handle.unsw.edu.au/1959.4/62680 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:58915/SOURCE02?view=true
Rutgers University
26.
Acerce, Muharrem, 1983-.
Electrochemical charge storage and electrochemomechanical behavior of chemically exfoliated and restacked MoS2 nanosheets.
Degree: PhD, Materials Science and Engineering, 2016, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/51181/
► In the past few decades, there has been a tremendous ongoing effort to understand the nature of nanomaterials. Shrinking dimensions of the materials to the…
(more)
▼ In the past few decades, there has been a tremendous ongoing effort to understand the nature of nanomaterials. Shrinking dimensions of the materials to the nanoscale regime reveal various intriguing properties of the nanomaterials due to quantum confinement effects. Especially, electron confinement in two dimensional materials enables compelling electronic properties as compared to the other nanostructured materials. Besides, thinning 2D materials down to monolayer thicknesses increases the surface-to-volume ratio to such an extent that makes them appealing for electrochemical
energy conversion and
storage technologies. Moreover, atomically thin 2D materials are flexible with good performance under bending, making them attractive materials for flexible electronics,
energy storage devices and actuators. Recent advancements in
energy storage technologies using 2D materials, particularly in materials such as graphene and its analogues, would finally make supercapacitors viable to complement or replace batteries. High surface-to-volume ratio and good ionic transport in addition to excellent electrical conductivity enables high charge
storage capacities with fast
energy uptake and delivery. For instance, graphene possess very high capacitive charge
storage performance thanks to pure electrostatic attraction of ions (electrochemical double layer effect) on the highly porous carbon surface. Besides, pseudocapacitive 2D materials such as transition metal carbides (Mxenes) possess good electrical conductivity and capacitive performance concurrently because of the presence of transition metal in the structure. Transition metal dichalcogenides (LTMDs) such as molybdenum disulphide (MoS2) are also studied candidate materials for electrochemical charge
storage as well. However, naturally occurring MoS2 has a 2H phase crystal structure with 1.9 eV band gap, which renders it semi-insulating and therefore not immediately attractive as an electrode material for
energy storage. Despite, the 1T phase of MoS2 is metallic and 107 time more conductive that 2H phase. The aim of this work is to use the metallic 1T phase of MoS2, which can be obtained from the semiconducting 2H phase of MoS2 during chemical exfoliation of the bulk material. In so doing, the ultimate goal is to exploit the phase transformation of MoS2 and successfully utilize it as supercapacitor electrode. The results show that that chemically exfoliated nanosheets of MoS2 containing a high concentration of the metallic 1T phase can electrochemically intercalate ions such as H+ , Li+ , Na+ and K+ with extraordinary efficiency and achieve capacitance values ranging from ∼400 to ∼700 F cm−3 in a variety of aqueous electrolytes. We also demonstrate that this material is suitable for high-voltage operation in non-aqueous organic electrolytes, showing prime volumetric
energy and power density values, coulombic efficiencies in excess of 95%, and stability over 5,000 cycles. As we show by X-ray diffraction analysis, these favourable electrochemical properties of 1T MoS2…
Advisors/Committee Members: Chhowalla, Manish (chair), Klein, Lisa (internal member), Amatucci, Glenn (internal member), Akdogan, Koray (internal member), Asefa, Tewodros (outside member).
Subjects/Keywords: Energy storage; Molybdenum disulfide
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APA (6th Edition):
Acerce, Muharrem, 1. (2016). Electrochemical charge storage and electrochemomechanical behavior of chemically exfoliated and restacked MoS2 nanosheets. (Doctoral Dissertation). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/51181/
Chicago Manual of Style (16th Edition):
Acerce, Muharrem, 1983-. “Electrochemical charge storage and electrochemomechanical behavior of chemically exfoliated and restacked MoS2 nanosheets.” 2016. Doctoral Dissertation, Rutgers University. Accessed January 24, 2020.
https://rucore.libraries.rutgers.edu/rutgers-lib/51181/.
MLA Handbook (7th Edition):
Acerce, Muharrem, 1983-. “Electrochemical charge storage and electrochemomechanical behavior of chemically exfoliated and restacked MoS2 nanosheets.” 2016. Web. 24 Jan 2020.
Vancouver:
Acerce, Muharrem 1. Electrochemical charge storage and electrochemomechanical behavior of chemically exfoliated and restacked MoS2 nanosheets. [Internet] [Doctoral dissertation]. Rutgers University; 2016. [cited 2020 Jan 24].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/51181/.
Council of Science Editors:
Acerce, Muharrem 1. Electrochemical charge storage and electrochemomechanical behavior of chemically exfoliated and restacked MoS2 nanosheets. [Doctoral Dissertation]. Rutgers University; 2016. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/51181/
Tartu University
27.
Palm, Rasmus.
Carbon materials for energy storage applications
.
Degree: 2018, Tartu University
URL: http://hdl.handle.net/10062/61219
► Uudsete energia salvestuse süsteemide väljaarendamine ning olemasolevate energia salvestuse süsteemide optimeerimine on vajalik selleks et enamus kasutatavast energiast saaks pärineda taastuvatest energiaallikatest. Süsinikmaterjalid on tähtsaks…
(more)
▼ Uudsete energia salvestuse süsteemide väljaarendamine ning olemasolevate energia salvestuse süsteemide optimeerimine on vajalik selleks et enamus kasutatavast energiast saaks pärineda taastuvatest energiaallikatest. Süsinikmaterjalid on tähtsaks komponendiks paljudes energiat salvestavates süsteemides, näiteks elektroodmaterjalidena patareides ning elektrilise kaksikkihi kondensaatorites või adsorbeerivate materjalidena energeetilise väärtusega gaasi hoiustamiseks. Süsinikmaterjalide struktuuri ning pinda saab muuta suurel määral lähtematerjali ning sünteesitingimuste valikuga. Paremate energiat salvestavate süsteemide, mis sisaldavat süsinikmaterjale, kavandamiseks on vaja hästi mõista süsinikmaterjalide struktuuri ja pinnaomaduste mõju antud süsteemide tööprotsessile.
Süsiniku pinnaomaduste üheks tähtsamaks parameetriks on eripindala, ehk materjali pindala ühe massiühiku kohta. Suure eripinna tagavad eeskätt materjali pinnas esinevad väikesed avavused ning pinna ebaühtlused, ehk poorid. Poorid võivad omada erinevaid mõõtmeid, mille järgi klassifitseeritakse poorid suuruse järgi mikro-, meso- ning makropoorideks. Süsinikmaterjalide puhul omavad suurimat huvi mikropoorsed materjalid, kus pooride mõõtmed on alla paari nanomeetri.
Erinevate pinnaomadustega ning struktuuri korrapäraga süsinikmaterjale uuriti elektrilise kaksikkihi kondensaatorite elektroodidena, metaani adsorbentidena ning kandematerjalina vesinikku salvestava materjali parendamiseks. Antud töö kinnitas, et energia mida on võimalik salvestada pinnaühiku kohta kasvab ühtlaselt pinna suurenemisega juhul kui toimub ilma laenguta gaasimolekuli adsorptsioon. Energia mida on võimalik salvestada pinnaühiku kohta omab piirilist väärtust pinna suurenemisega juhul kui toimub laetud osakeste adsorptsioon elektrilisse kaksikkihti. Lisaks eripinna suurele tähtsusele määrati metaani salvestamise suurem efektiivsus kui kasutati korrapäratumaid ning väiksemate pooridega materjalide. Süsinikmaterjali kasutamine komplekshüdriidi kandematerjalina alandas temperatuuri, mille juures algas vesiniku eraldumine, üle 100 °C võrreldes puhta kompleksmetallhüdriidiga.; For standalone renewable
energy production to be viable novel
energy storage systems need to be developed or existent systems need to be improved. Carbon materials are an important component in many
energy storage systems, from battery and electrical double layer capacitor electrodes to energetically valuable gas adsorbents. Depending on the carbon material synthesis conditions and used precursor material carbon materials surface properties and structure can be varied in a wide margin. To design better
energy storage systems, which contain carbon materials, it is necessary to have a deep understanding of the influence of carbon materials structure and surface properties on the processes in
energy storage systems.
Specific surface area, surface per unit of mass, is one of the most important carbon surface parameters characterising the surface of carbon materials. A large specific surface area is possible in case…
Advisors/Committee Members: Lust, Enn, juhendaja (advisor), Kurig, Heisi, juhendaja (advisor).
Subjects/Keywords: energy storage;
carbon materials
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APA ·
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Manager
APA (6th Edition):
Palm, R. (2018). Carbon materials for energy storage applications
. (Thesis). Tartu University. Retrieved from http://hdl.handle.net/10062/61219
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Palm, Rasmus. “Carbon materials for energy storage applications
.” 2018. Thesis, Tartu University. Accessed January 24, 2020.
http://hdl.handle.net/10062/61219.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Palm, Rasmus. “Carbon materials for energy storage applications
.” 2018. Web. 24 Jan 2020.
Vancouver:
Palm R. Carbon materials for energy storage applications
. [Internet] [Thesis]. Tartu University; 2018. [cited 2020 Jan 24].
Available from: http://hdl.handle.net/10062/61219.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Palm R. Carbon materials for energy storage applications
. [Thesis]. Tartu University; 2018. Available from: http://hdl.handle.net/10062/61219
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Tartu University
28.
Pajusalu, Mihkel.
Localized Photosynthetic Excitons
.
Degree: 2014, Tartu University
URL: http://hdl.handle.net/10062/43646
► Peaaegu kogu inimkonna poolt tarbitav toit ja näiteks ka fossiilsed kütused on toodetud elusorganismide poolt kinnipüütud päikesevalguse abil. Elusloodus on suutnud sellel viisil päikeseenergiat koguda…
(more)
▼ Peaaegu kogu inimkonna poolt tarbitav toit ja näiteks ka fossiilsed kütused on toodetud elusorganismide poolt kinnipüütud päikesevalguse abil. Elusloodus on suutnud sellel viisil päikeseenergiat koguda juba miljardeid aastaid ja väga suures mastaabis, saades samas hakkama väga väheste vahenditega. See kõik on võimalik tänu elusorgamismide võimele paigutada aatomeid väga täpselt mõnenanomeetrise suurusega struktuurideks.
Purpurbakterid on ühed vanimad organismid Maal, kes on võimelised päikesevalgust koguma ja enda toitmiseks kasutama. Bakterid on miljardite aastate jooksul suutnud välja töötada väga keerukaid energiakogumise meetodeid, mida saaks ka inimtehnoloogias kasutada. Nende süsteemide mõistmise keerukus tuleneb nende toimimise aluseks olevast kvantmehaanikast, mis tavaliselt avaldub äärmiselt korrapärastes tingimustes (nagu pooljuhtkristallides) väga madalatel temperatuuridel (nagu heeliumi keemistemperatuuril -270 °C juures).
Selles töös proovisime edendada arusaamu purpurbakterite valgust koguvate antennisüsteemide tööpõhimõtete kohta. Me suutsime tõestada, et need väikesed nanostruktuurid suudavad footoneid kinni püüda ja neid kvaasiosakesteks (eksitonideks) muundada. Neid eksitone saab siis transportida ja keemilise energiana salvestada. Tuleb välja, et see on siiski võimalik, kuigi tingimused eluslooduses on väga kaugel tingimustest, mis valitsevad pooljuhtkristallides absoluutse nulltemperatuuri lähedal. Uurimus põhines optilise spektroskoopia ja kvantmehaanilise modelleerimise ühendamisel. Koostatud mudel võimaldab ka seletada erinevusi üksikute valgust koguvate komplekside vahel, mis varem on põhjustanud eksperimentaalsete andmete väärtõlgendamist. Kokkuvõttes jõudsime paremale arusaamale nende komplekside tööst ja loodetavasti saab tulevikus nende tööpõhimõtteid rakendada ka inimkonna energiavajaduse rahuldamisel.; Virtually all of the food consumed by humans and, for example, fossil fuels, have been produced by capturing sunlight and storing it as chemical energy in the process of photosynthesis. Living nature has been able to collect solar energy this way for billions of years and in very large scales, managing at the same time to do this with very common chemical elements. This is possible thanks to living nature’s ability to place atoms into complex arrangements on the scale of a few nanometres.
Purple bacteria are possibly the oldest organisms on the Earth capable of harvesting the sunlight to feed themselves. During billions of years, bacteria have developed very complex methods for energy capture that could also prove useful in human technology. The complexity in understanding these systems lies in the fact that their operation is based on quantum mechanical effects, which ordinarily exhibit in highly regular systems (such as semiconductor crystals) at extremely low temperatures, such as at the boiling point of liquid helium (-270 °C).
In this work, we tried to expand our understanding of the mechanisms behind the functioning of the light-harvesting complexes of purple bacteria. We managed…
Subjects/Keywords: eksitonid;
energiasalvestus;
excitons;
energy storage
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APA ·
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Export
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Manager
APA (6th Edition):
Pajusalu, M. (2014). Localized Photosynthetic Excitons
. (Thesis). Tartu University. Retrieved from http://hdl.handle.net/10062/43646
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Pajusalu, Mihkel. “Localized Photosynthetic Excitons
.” 2014. Thesis, Tartu University. Accessed January 24, 2020.
http://hdl.handle.net/10062/43646.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Pajusalu, Mihkel. “Localized Photosynthetic Excitons
.” 2014. Web. 24 Jan 2020.
Vancouver:
Pajusalu M. Localized Photosynthetic Excitons
. [Internet] [Thesis]. Tartu University; 2014. [cited 2020 Jan 24].
Available from: http://hdl.handle.net/10062/43646.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Pajusalu M. Localized Photosynthetic Excitons
. [Thesis]. Tartu University; 2014. Available from: http://hdl.handle.net/10062/43646
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Texas – Austin
29.
Womac, Nicholas David.
Stiffness and energy storage characteristics of energy storage and return prosthetic feet.
Degree: MSin Engineering, Mechanical Engineering, 2017, University of Texas – Austin
URL: http://hdl.handle.net/2152/64116
► Prosthetists currently lack quantifiable measures to guide prosthesis prescriptions and must rely on experience and manufacturer recommendations. Studies have shown that stiffness and energy storage…
(more)
▼ Prosthetists currently lack quantifiable measures to guide prosthesis prescriptions and must rely on experience and manufacturer recommendations. Studies have shown that stiffness and
energy storage characteristics of prosthetic feet significantly influence amputee gait. Consequently, several studies have attempted measure these mechanical characteristics, but typically measure only a few orientations in a single plane. This study examined the stiffness and
energy storage characteristics of several prostheses over normal gait orientations with the goal of improving prosthesis prescriptions. Feet from five different manufacturers were tested with twenty-five different combinations of foot style, stiffness category and heel wedge inclusion. Force-displacement data were collected at fifteen sagittal orientations and five coronal orientations, and were used to calculate stiffness and
energy storage. Loading conditions at each sagittal orientation were determined using a representative amputee’s scaled walking data. Stiffness and
energy storage were found to be highly non-linear in both the sagittal and coronal planes. Across all feet, stiffness was greatest near foot flat in the sagittal plane. Generally, stiffness decreased with greater heel, forefoot, medial and lateral loading orientations.
Energy storage was greatest for forefoot loading and increased with medial or lateral loading orientations. As stiffness category increased within a foot style, stiffness increased and
energy stored decreased. However, the recommended weight for a given foot was not linearly related to stiffness or
energy storage. In addition, feet with similar manufacturer recommended weight ranges had varied
energy storage over all orientations and varied stiffness over heel and foot flat loading orientations. Inclusion of heel wedges increased stiffness and decreased
energy storage over heel and foot flat loading for the Vari-Flex with EVO foot, but not the Sierra foot. These results may help improve clinical prescriptions by providing prosthetists with quantitative measures to compare feet.
Advisors/Committee Members: Neptune, Richard R. (advisor), Klute, Glenn K (committee member).
Subjects/Keywords: Prostheses; Stiffness; Energy storage
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APA ·
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Export
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Manager
APA (6th Edition):
Womac, N. D. (2017). Stiffness and energy storage characteristics of energy storage and return prosthetic feet. (Masters Thesis). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/64116
Chicago Manual of Style (16th Edition):
Womac, Nicholas David. “Stiffness and energy storage characteristics of energy storage and return prosthetic feet.” 2017. Masters Thesis, University of Texas – Austin. Accessed January 24, 2020.
http://hdl.handle.net/2152/64116.
MLA Handbook (7th Edition):
Womac, Nicholas David. “Stiffness and energy storage characteristics of energy storage and return prosthetic feet.” 2017. Web. 24 Jan 2020.
Vancouver:
Womac ND. Stiffness and energy storage characteristics of energy storage and return prosthetic feet. [Internet] [Masters thesis]. University of Texas – Austin; 2017. [cited 2020 Jan 24].
Available from: http://hdl.handle.net/2152/64116.
Council of Science Editors:
Womac ND. Stiffness and energy storage characteristics of energy storage and return prosthetic feet. [Masters Thesis]. University of Texas – Austin; 2017. Available from: http://hdl.handle.net/2152/64116
Massey University
30.
Mortensen, Kelsey Leigh.
Development of a new cathode for aqueous rechargeable batteries.
Degree: PhD, Chemistry, 2015, Massey University
URL: http://hdl.handle.net/10179/6976
► The demand for low/cost energy storage is a current issue. Existing batteries are unable to meet this constraint due to the high raw material prices,…
(more)
▼ The demand for low/cost energy storage is a current issue. Existing batteries are
unable to meet this constraint due to the high raw material prices, in particular
the metal content. The risk of fluctuating metal prices and future availability will
not meet the market demand and therefore alternative materials need to be
considered.
The focus of this project was to develop a non/metal based battery electrode
specifically for stationary battery systems. This study presents fundamental
concepts required to form a rechargeable electrochemical storage device
utilising hydrogen peroxide as the electroactive species. This involved two key
aspects: immobilisation of hydrogen peroxide in order to prevent self/discharge
and catalytic regeneration of hydrogen peroxide from hydroxide ions. Although
the construction of the device was not within the scope of this project, the
chemical and electrochemical analysis of potential compounds were evaluated at
a molecular level. In particular, the synthesis and molecular behaviour of a urea/
based ’binder‘ that will immobilise hydrogen peroxide, and an oxoammonium
’catalyst‘ to reform hydrogen peroxide during recharge of the battery.
Additionally, the attachment of these compounds to a surface was also
evaluated.
Analysis of the interactions between substituted ureas (‘binder’) and hydrogen
peroxide proved challenging. Although these findings suggest that adduct
formation is occurring, the methods undertaken were not able to determine the
equilibrium constant or strength of binding. They did however give an indication
of the quantity of hydrogen peroxide in the synthesised adducts and this
methodology can be applied to the range of hydrogen peroxide adducts.
Additionally, functionalisation of surfaces with a diazonium/containing
substituted urea was achieved and is a viable method for attaching the ‘binder’
to the electrode substrate material.
The second key step is to incorporate a rechargeable aspect to the battery
system. An oxoammonium cation was proposed to act as a ‘catalyst’ to replenish
H2O2 during charging. Details regarding the synthetic methodology for synthesis
of nitroxide/containing compounds, incorporating diazonium functionalities for
attachment to a surface, were obtained. Of particular interest was the amido/
TEMPO structure that was electrochemically attached to a carbon surface
electrode. Evaluation of its ability to form H2O2 was achieved using a
bi/potentiostat where a current density of 0.21 A m/2 was observed. This novel
idea shows promise and demonstrates the ability for the catalyst to replenish
H2O2 in an aqueous battery system.
Subjects/Keywords: Batteries;
Energy storage;
Battery design
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APA (6th Edition):
Mortensen, K. L. (2015). Development of a new cathode for aqueous rechargeable batteries. (Doctoral Dissertation). Massey University. Retrieved from http://hdl.handle.net/10179/6976
Chicago Manual of Style (16th Edition):
Mortensen, Kelsey Leigh. “Development of a new cathode for aqueous rechargeable batteries.” 2015. Doctoral Dissertation, Massey University. Accessed January 24, 2020.
http://hdl.handle.net/10179/6976.
MLA Handbook (7th Edition):
Mortensen, Kelsey Leigh. “Development of a new cathode for aqueous rechargeable batteries.” 2015. Web. 24 Jan 2020.
Vancouver:
Mortensen KL. Development of a new cathode for aqueous rechargeable batteries. [Internet] [Doctoral dissertation]. Massey University; 2015. [cited 2020 Jan 24].
Available from: http://hdl.handle.net/10179/6976.
Council of Science Editors:
Mortensen KL. Development of a new cathode for aqueous rechargeable batteries. [Doctoral Dissertation]. Massey University; 2015. Available from: http://hdl.handle.net/10179/6976
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