Interface engineering in LGPS-type solid-state electrolytes for all-solid-state lithium batteries

As key components of next-generation battery energy storage systems, solid-state batteries have attracted widespread attention. Li10GeP2S12 (LGPS)-type solid-state electrolytes (SSEs) are favored by researchers owing to their excellent ionic conductivity and potential high-temperature stability. However, the poor interface between LGPS-type SSEs and electrodes has seriously hindered the commercialization of LGPS all-solid-state lithium batteries. This review introduces the structure and Li-ion conduction mechanisms of LGPS-type SSEs and discusses the challenges related to LGPS-type SSEs/electrode interfaces, along with strategies for overcoming these challenges. To improve the interface compatibility, researchers have developed feasible methods for improving and optimizing LGPS-type SSEs. The review concludes with potential research directions and prospects of future LGPS all-solid-state lithium batteries.