Interfacial engineering in sulfide-based all-solid-state batteries: from cathode/anode interfaces to electrolyte modification

transport, and contact stability. Bulk and surface regulation of sulfide electrolytes, together with thin-film processing, are also examined. These studies suggest that effective interface design should focus not simply on suppressing reactions, but on forming stable interphases that maintain ionic transport while limiting electronic leakage and mechanical degradation. Future development will require closer integration of interfacial chemistry, electrode architecture, and scalable processing under practical cell conditions.