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Vanderbilt University

1. Muralidharan, Nitin. Mechano-Electrochemistry for Advanced Energy Storage and Harvesting Devices.

Degree: PhD, Interdisciplinary Materials Science, 2018, Vanderbilt University

A fundamental perception in the energy storage community is that mechanical processes accompanying electrochemical processes are an unavoidable by-product. However, the coupling between mechanics and electrochemistry termed as the âmechano-electrochemical couplingâ is a powerful yet unexplored tool. Using principles of elastic strain engineering, we demonstrate controllable modulation of electrochemical parameters governing energy storage systems. Leveraging the shape memory properties of NiTi alloys, redox potentials and diffusion coefficient modulations for energy storage materials were achieved as a function of applied strain. Building off these principles, we developed electrochemical-mechanical energy harvesters for harnessing ambient mechanical energy at very low frequencies (<5 Hz), a regime where the conventional state-of the art piezoelectric and triboelectric energy harvesters have drastically reduced performances. We also highlight frequency tuning capabilities in this class of energy harvesters owing to the inherent differences in various battery electrode chemistries for use in human motion harvesting and sensing applications and multifunctional transient energy harvesting and storage devices. Additionally, to further illustrate the relationship between mechanical and electrochemical properties, we developed multifunctional structural supercapacitor and battery composites for use in load-bearing applications. Overall, these approaches provide paradigm shifting fundamental insights as well as create a framework for developing such multifunctional energy storage/harvesting architectures for a multitude of applications. Advisors/Committee Members: Dr. Cary Pint (chair), Dr. Douglas Adams (chair), Dr. Greg Walker (committee member), Dr. Rizia Bardhan (committee member), Dr. Leon Bellan (committee member), Dr. Piran Kidambi (committee member).

Subjects/Keywords: electrochemical mechanical coupling; energy harvesting; in-situ; strain; stress; mechanical processes; elastic strain engineering; strain setting; substrate strains; shapememory alloy; superelastic; multifunctional energy storage; transient energy harvesters; transient energy storage; pseudocapacitors; supercapacitors; load-bearing; structural; human motion harvesting; modulating electrochemistry; mechano-electrochemistry; advanced energy storage; advanced energy harvesting; low frequency energy harvesting; ambient energy harvesting; electrochemical-mechanical energy harvesting; Nitinol; battery mechanics; strain engineering; energy storage

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Muralidharan, N. (2018). Mechano-Electrochemistry for Advanced Energy Storage and Harvesting Devices. (Doctoral Dissertation). Vanderbilt University. Retrieved from http://etd.library.vanderbilt.edu/available/etd-06142018-084514/ ;

Chicago Manual of Style (16th Edition):

Muralidharan, Nitin. “Mechano-Electrochemistry for Advanced Energy Storage and Harvesting Devices.” 2018. Doctoral Dissertation, Vanderbilt University. Accessed December 13, 2019. http://etd.library.vanderbilt.edu/available/etd-06142018-084514/ ;.

MLA Handbook (7th Edition):

Muralidharan, Nitin. “Mechano-Electrochemistry for Advanced Energy Storage and Harvesting Devices.” 2018. Web. 13 Dec 2019.

Vancouver:

Muralidharan N. Mechano-Electrochemistry for Advanced Energy Storage and Harvesting Devices. [Internet] [Doctoral dissertation]. Vanderbilt University; 2018. [cited 2019 Dec 13]. Available from: http://etd.library.vanderbilt.edu/available/etd-06142018-084514/ ;.

Council of Science Editors:

Muralidharan N. Mechano-Electrochemistry for Advanced Energy Storage and Harvesting Devices. [Doctoral Dissertation]. Vanderbilt University; 2018. Available from: http://etd.library.vanderbilt.edu/available/etd-06142018-084514/ ;

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