Proceedings of MATSUS Spring 2024 Conference (MATSUS24)
DOI: https://doi.org/10.29363/nanoge.matsus.2024.216
Publication date: 18th December 2023
All-solid-state batteries (ASSBs) with sulfide-based solid electrolytes with high ionic conductivity are regarded as the ultimate next-generation energy storage systems due to their enhanced safety and energy density by enabling the use of metallic anodes. Li metal is considered a promising anode material for ASSBs because of its high theoretical specific capacity (3860 mAh/g) and the lowest electrochemical potential (-3.04 V versus standard hydrogen electrode). However, its practical use has been hindered by several issues related to the interface, such as contact loss during cycling, which accelerates Li dendrite growth, and chemical instability between Li and sulfide-based solid electrolytes. In this talk, the fundamental degradation mechanisms of the ASSBs underlying electrochemical and mechanical aspects are introduced first. Subsequently, we introduce our strategies to stabilize the Li metal and sulfide-based solid electrolytes interface. The designed ASSBs could effectively retard the Li dendrite growth and unwanted side reaction and shows much enhanced electrochemical performance.
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