Abstract
All-solid-state lithium (Li) metal batteries (ASLMBs) have attracted enormous attention due to the safety of solid-state electrolytes (SSEs) and the high energy density of Li metal. Among various SSEs, sulfide SSEs, especially the Li10GeP2S12 (LGPS), shows liquid electrolytes comparable conductivity at room temperature, thus being considered as one of the most promising candidates. However, the interfacial issues with Li have severely hindered the further development of the LGPS-based ASLMBs. Herein, we present the distinctive crystal structure and ion transport mechanism of LGPS at first. The origin of the interfacial issues with Li and the corresponding modification strategies are summarized then. Finally, combined with the present opportunities and challenges, perspectives are presented in the end for designing practically accessible LGPS-based ASLMBs in the future.
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