Interfacial Reactions in Inorganic All‐Solid‐State Lithium Batteries

Abstract Replacing organic liquid electrolytes (LEs) in lithium‐ion batteries (LIBs) with solid‐state electrolytes (SSEs) to achieve all‐solid‐state lithium batteries (ASSLBs) with improved safety and potential higher energy density has been attracting growing attention for their wide application in various electronic devices, electric vehicles and renewable energy integration. To achieve high‐performance ASSLBs, the design of SSEs with high ionic conductivity, easy processability, and compatible and stable interfaces with the cathode and anode has become a research priority in recent years. Among all the challenges and issues concerning interfaces, the mechanisms and suppression methods of interfacial reactions are particularly important in the rational design of efficient electrolyte/electrode interfaces. This review mainly focuses on interfacial reactions in various types of inorganic ASSLBs and significant negative effects on battery performance. We also highlight advanced characterization methods and summarize some notable approaches to stabilize interfaces. Finally, we believe the scientific prospect of ASSLBs interface research will be helpful to keep pace with future research trends.