Interface between Lithium Metal and Garnet Electrolyte: Recent Progress and Perspective

Garnet electrolytes (GEs) with high ion conductivity, excellent stability against lithium metal (LM) as well as wide electrochemical potential window are attracting increasing interest as they have the potential to enable all-solid-state Li metal batteries (ASSLMBs). However, GEs-based ASSLMBs deeply suffer from daunting problems such as high resistance, fast short circuit, and rapid performance degradation, which can be largely attributed to unsatisfactory LM/GE interface. To this end, this minireview focuses on the LM/GE interface by summarizing the main challenges comprehensively, recapitulating emerging strategies for these challenges, and providing perspectives for future research.