"The Many Layers of Solid-State Batteries"
by Victoria Ferrari
Friday, April 21, 2023 -- 12:00 p.m.
Large Conference Room, 1207 Energy Research Facility
Advisor: Professor Gary Rubloff
Lithium-ion batteries are present in different aspects of our lives, like in electric vehicles, portable devices and biomedical applications. However, the increasing of safety of such devices is a major consideration that contributed to further research of solid-state batteries. Here, I will present the design and development of thin-film solid-state batteries (TFSSBs), in which a variety of shapes and sizes of those devices is possible thanks to the fabrication process, which offers compatibility with microelectronics. In this overview, I will show that the choice of materials is essential for each part of the battery, and why the study of the chemical and physical properties of interfaces is so important for better improvement of the battery performance. The results confirm that a combination of electrical measurements such as Electrochemical Impedance Spectroscopy (EIS) and X-Ray Photoelectron Spectroscopy (XPS) could provide information on chemical changes as a function of state-of-charge and also on electronic band structure of cathode-electrolyte interfaces. This work was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Grant DE-SC0021070.