Mechano-Electrochemistry for Advanced Energy Storage and Harvesting Devices
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 ‘mechano-electrochemical coupling’ 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.
This item appears in the following collection(s):
Showing items related by title, author, creator and subject.
Challenging Conventional Approaches to Energy Storage: Direct Integration of Energy Storage into Solar Cells, the Use of Scrap Metals to Build Batteries, and the Development of Multifunctional Structural Energy Storage Composites Westover, Andrew Scott (2016-11-22)Department: Interdisciplinary Materials ScienceSince the development of batteries by Edison and Volta, energy storage has become an integral part of our technology. As the energy storage devices we manufacture, research and develop new energy storage systems has been ...
Pedchenko, Alexander Vadimovich (2015-12-08)Department: Mechanical EngineeringDue to approximately one quarter of the bridges in the United States being classified as “functionally obsolete” or “structurally deficient”, there is currently a large demand for frequent bridge inspection. This demand ...
Yilmaz, Mesut (2019-08-19)Department: Electrical EngineeringCathodes are one of the most important components of energy generation/storage devices. In dye-sensitized solar cells (DSSCs) and photocapacitors, cathodes are critical in determining the cell’s properties such as the ...