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Title Zeolite templated carbons: investigations in extreme temperature electrochemical capacitors and lead-acid batteries
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Date Accessioned
Degree PhD
Discipline/Department Materials Science and Engineering
Degree Level doctoral
University/Publisher Georgia Tech
Abstract Porous carbons are versatile materials with applications in different fields. They are used in filtration, separation and sequestration of fluids and gases, as conductive additives in many energy storage materials, as coloring agents, as pharmaceutical and food additives, and in many other vital technologies. Porous carbons produced by pyrolysis and activation of organic precursors commonly suffer from poorly controlled morphology, microstructure, chemistry, and pore structure. In addition, the poorly controlled parameters of porous carbons make it challenging to elucidate the underlying key physical parameters controlling their performance in energy storage devices, including electrochemical capacitors (ECs) and lead-acid batteries (LABs). Zeolite-templated carbons (ZTCs) are a novel class of porous carbon materials with uniform and controllable pore size, microstructure, morphology, and chemistry. In spite of their attractive properties, they have never been explored for use in LABs and their studies for ECs have been very limited. Here I report a systematic study of ZTCs applications in ECs operating at temperatures as low as - 70 C and in LABs. Greatly improved power and energy performance, compared to state of the art devices, has been demonstrated in the investigated ECs. Moreover, the application of ZTCs in LABs has resulted in a dramatic enhancement of their cycle life and power and energy densities.
Subjects/Keywords Ultracapacitor; Supercapacitor; Zeolites; Carbon; Porous material; Energy storage; Electrolytic cells; Electric batteries
Contributors Yushin, Gleb (Committee Chair); Bucknall, David (Committee Co-Chair); Alexeev, Alexander (Committee Member); Jagannathan,Sudhakar (Committee Member); Mihara, David (Committee Member)
Country of Publication us
Record ID handle:1853/47643
Repository gatech
Date Indexed 2018-01-11
Issued Date 2012-04-06 00:00:00
Note [degree] PhD; [advisor] Committee Chair: Yushin, Gleb; Committee Co-Chair: Bucknall, David; Committee Member: Alexeev, Alexander; Committee Member: Jagannathan,Sudhakar; Committee Member: Mihara, David;

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…filtration, separation and sequestration of fluids and gases, as conductive additives in many energy storage materials, as coloring agents, as pharmaceutical and food additives, and in many other vital technologies. Porous carbons produced by pyrolysis and…

…temperature operations such as the Air Force’s More Electric Initiative (MEI) 13. Momentum has been increasing significantly over the past decade with respect to what is perceived by many to be an established chemistry - LABs. LABs were invented in…

…underway in Li-ion and NiMH chemistries in order to facilitate their utilization in hybrid-electric vehicles (HEVs). Despite the lower energy densities of LABs, by improving their performance there is a place for LABs in electric vehicles, from…

…current applications which could benefit from these enhancements include memory backup, energy efficient hybrid engines, electric vehicles, high power electric tools, and power quality. Many of these applications are currently feasible yet are stymied by

electric vehicle by a LAB. In 1891 a LAB-based electric submarine was launched. The telegraph and telephone companies along with the light bulb demanded the deployment of batteries on a large scale. Planté’s plates competed with Faure’s pasted plates till…

…Principles of Operation 1.3.1 Capacitors The following g sections provide a description of the physical processes underlying the operation of electrochemical capacitors. Since the inspiration for the model given by Helmholtz came from the understanding of…

…electrostatic capacitors are generally constructed out of two metal plates, separated d by vacuum or dielectric materials, such as air, water, barium titanate, or silicon dioxide 34 . Figure 1.4 shows a simplified response of the dielectric material and a…

…transmit an electric field and is affected by the behavior of the material under a polarizing field 29. As the material is subjected to the electric field, it has several polarization mechanisms that may take place, which include electronic, ionic, dipolar…

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