LAUSR

All-solid-state batteries (ASSBs) based on inorganic solid electrolytes (SEs) are one of the most promising strategies for next-generation energy storage systems and electronic devices due to the higher energy density and intrinsic safety. However, the poor solid-solid contact and restricted chemical/electrochemical stability of inorganic SEs both in cathode and anode SE interfaces cause contact failure and the degeneration of SEs during prolonged charge-discharge process. As a result, the increasing interface resistance significantly hinders the coulombic efficiency and cycling performance of ASSBs. Herein, we present a fundamental understanding of physical contact and chemical/electrochemical features of the ASSB interfaces based on mainstream inorganic SEs and summarize the recent work on interface modification. SE doping, optimizing morphology, introduce interlayer/coating layer and utilizing compatible electrode materials are the key methods to prevent the side reactions which are discussed separately in cathode/anode-SE interface We Also highlight the constant extra stack pressure applied during ASSBs cycling, which is important to the electrochemical performance. Finally, our perspectives of interface modification for practical high-performance ASSBs are put forward.