Proceedings of MATSUS23 & Sustainable Technology Forum València (STECH23) (MATSUS23)
DOI: https://doi.org/10.29363/nanoge.matsus.2023.184
Publication date: 22nd December 2022
All-solid-state lithium metal batteries (ASSLMBs) 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 the holy grail anode material because of its high theoretical specific capacity (3860 mAh/g) and the lowest electrochemical potential (-3.06 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 metal and sulfide-based solid electrolyte. To construct safe and high energy density ASSLBs, understanding the degradation mechanism of the ASSLBs is imperative. In this talk, the fundamental degradation mechanisms of the ASSLMBs underlying electrochemical and mechanical aspects are introduced first. Subsequently, we briefly review the current research on the ASSLMSs. Finally, this presentation introduces our strategies for developing high-performance ASSLMBs by stabilizing the Li metal and sulfide-based solid electrolytes interface. The designed ASSLMBs could effectively retard the Li dendrite growth and unwanted side reaction and shows much enhanced electrochemical performance.
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