THE SCHOOL OF MATERIALS SCIENCE AND ENGINEERING
GEORGIA INSTITUTE OF TECHNOLOGY
Under the provisions of the regulations for the degree
MASTER OF SCIENCE
on Thursday, April 22, 2021
BlueJeans Video Conferencing
will be held the
MASTER’S THESIS DEFENSE
“Fabrication & Characterization of High Energy Density Solid State Metal Fluoride Microbatteries"
Prof. Gleb Yushin, Advisor, MSE
Prof. Matthew McDowell, MSE/ME
Prof. Preet Singh, MSE
Prof. Faisal Alamgir, MSE
The increased proliferation of consumer electronics and electric vehicles has led to an exponential increase in the demand for lithium-ion batteries. Commercially used intercalation-based cathode materials in Li-ion batteries have relatively low capacity, high manufacturing costs, and sourcing / ethical concerns. Metal fluoride-based conversion cathodes promise unique benefits over these materials with regards to theoretical capacities, safety, supply, and cost. However, when built into full cells with liquid electrolytes, they have historically suffered side effects that lead to early cell degradation: poor ionic conductivity, volume swelling, resistance buildup, and morphological changes.
In this thesis, I will investigate a workaround of these symptoms by constructing an all solid-state architecture. The deliberate design of a liquid/polymer solvent-free cathode provides a more stable window by which to analyze cycling behavior and electrochemical performance. This defense focuses on the novel electrode and electrolyte fabrication methods used to achieve such a structure and associated characterization.