Silicon/Tin‐Based Anodes for All‐Solid‐State Lithium‐Ion Batteries with Sulfide Electrolytes

Abstract Exploring alternative anodes to achieve higher energy density in lithium‐ion batteries is a crucial challenge for both academia and industry. Si/Sn‐based anodes are promising candidates due to their exceptionally high theoretical capacities, extensive industrial availability, and environmentally friendly nature. However, the practical application of Si/Sn‐based anodes is hindered by battery failures caused by the dramatic volume expansion and structural collapse in liquid‐electrolyte LIBs. All‐solid‐state lithium‐ion batteries (ASSLIBs) utilizing sulfide solid electrolytes (S‐SEs) present promising opportunities for Si/Sn‐based anodes due to the high conductivity as well as excellent mechanical properties of S‐SEs and all‐solid feature of ASSLIBs, which lead to facilitated ion transportation and much‐restricted volume change that helps to ensure interfacial contact and long‐term stability. This review first discusses the significance and issues of using Si/Sn‐based anodes and S‐SEs in ASSLIBs. It then comprehensively summarizes the key progress in high‐performance Si/Sn‐based anodes in ASSLIBs utilizing S‐SEs, with the focus on different electrode configurations, and structure design and component regulation of anode materials. The efficient strategies toward ASSLIB full cells with particular considerations on cathode selection, thin S‐SEs design, and advanced device manufacturing are further assessed. Last, remaining issues, challenges, and future research opportunities for Si/Sn‐based anodes in high‐energy‐density ASSLIBs employing S‐SEs are outlined.