Li-argyrodite sulfide solid electrolytes: From fundamental research to industrialization

All-solid-state lithium batteries (ASSLBs) have great potential for achieving high energy density and enhanced safety. Among the various solid electrolytes, Li-argyrodite sulfide solid electrolytes (SSEs) show considerable promise for commercialization due to their superior ionic conductivity and outstanding mechanical deformability. However, intrinsic challenges, such as moisture sensitivity, interface instability, and high cost, significantly limit their practical applications. This review systematically examines the ion-transport mechanisms, synthesis strategies, and air stability improvement strategies for Li-argyrodite SSEs while discussing interface challenges and corresponding solutions in sulfide-based ASSLBs. We further assess the feasibility and limitations of these strategies from fundamental research to industrial-scale implementation. The industrialization potential of Li-argyrodite SSEs is analyzed at the material, electrode, and cell levels. This review aims to provide a practical guide for accelerating the transition from laboratory to industrial production, facilitating the widespread adoption of sulfide-based ASSLBs.