Isolating Battery Components to Understand How Processing Affects Interface Formation

by Victoria Ferrari

Friday, November 3, 2023 -- 12:00 p.m.
Large Conference Room, 1207 Energy Research Facility

Advisor:  Prof. Gary Rubloff

Interfaces dominate the performance of electrochemical systems, from interphase formation to charge transfer impedances, and they require careful study to understand. We have undertaken a broadly applicable approach to isolating components of a solid-state battery (SSB) to analyze them using non-destructive electrochemical impedance spectroscopy (EIS), and systematically build up to the full device. In this talk, I will explain how it was possible to study those individual components by fabricating them in parallel with the SSB, ensuring a 1:1 comparison. Electric circuit models were created for each battery component and their parameters were used as initial inputs for the modeling of a full SSB. Using this innovative methodology, it was possible to investigate the interfaces in SSBs, including chemical and physical reactions, and to provide insights into improving their overall performance.

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