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Development Of High-Performance All-Solid-State Batteries, Jianneng Liang

Electronic Thesis and Dissertation Repository

All-solid-state batteries (ASSBs) with polyethylene oxide (PEO)-based solid polymer electrolytes (SPEs) or oxide-based solid-state electrolytes (SSEs) are promising candidates for electric vehicles application. However, ASSBs suffer from critical challenges including (i) low electrochemical oxidation window, (ii) poor interface contact, (iii) incompatibility between the SSE and electrode. This thesis, therefore, focuses on various strategies for addressing these problems and understanding the insight mechanisms.

To address the low oxidation window challenge of SPE, surface engineering method was used. The surface coating on LiCoO₂, and/or carbon particles with lithium tantalate was conducted. This study disclosed that carbon particles/SPE interface is detrimental …