All-solid-state lithium metal batteries adopting polymer-, oxide-, and sulfi de-based solid electrolytes have drawn signifi cant

interest due to their potential for enhanced energy density and non-fl ammable characteristics. Each type of solid electrolyte

off ers distinct benefi ts, such as the mechanical fl exibility of polymer electrolytes, the thermal stability of oxide electrolytes,

and the high ionic conductivity of sulfi de electrolytes. However, the unstable interface between metallic Li anode and solid

electrolytes remains a major obstacle, leading to issues like dendritic Li growth, increased interfacial resistance, and solid

electrolyte degradation. To address these challenges, various strategies focusing on interfacial engineering have been implemented,

achieving notable improvements in overall battery performance. This review focuses on strategies to stabilize the

interface for each type of electrolyte, detailing principles and key eff ects of these approaches. In addition, the remaining

challenges required for the commercialization of all-solid-state lithium metal batteries are briefl y discussed.