Recent research progress on sulfide solid electrolytes and sulfide-based all-solid-state lithium-ion batteries

All-solid-state lithium batteries (ASSLBs) using sulfide (SEs) have emerged as highly promising candidates for next-generation energy storage technologies owing to their intrinsic safety and remarkable theoretical energy density. However, the limited electrochemical stability of sulfide SEs, coupled with various interface issues arising from solid-solid contact with cathode materials, has slowed the progress toward the commercialization of sulfide-oriented ASSLBs. Significant endeavors have been devoted to the advancement of sulfide-based ASSLBs, with notable progress achieved in recent years. This review summarizes the types and properties of sulfide SEs, discusses the merit and demerit associated with various preparation methods, and comprehensively analyzes the interface challenges between cathode materials and sulfide SEs, along with corresponding solutions. It also highlights recent research progress and potential future directions for improving sulfide-based ASSLBs. This review not only provides a comprehensive understanding of sulfide-based ASSLBs but also lays the groundwork for advancing sustainable and efficient energy storage systems.