Recent advances of silicon-based solid-state lithium-ion batteries

Solid-state batteries (SSBs) have been widely considered as the most promising technology for next-generation energy storage systems. Among the anode candidates for SSBs, silicon (Si)-based materials have received extensive attention due to their advantages of low potential, high specific capacity and abundant resource. However, Si-based anodes undergo significant volume changes during repeated charging and discharging process, leading to irreversible degradation of electrode/electrolyte interface and rapid capacity fading of SSBs. Therefore, the development of Si-based SSBs is still limited to laboratory level. In this review, we systematically summarized the research advances of Si-based SSBs from the aspects of the design principle of electrodes structure, the selection of solid-state electrolytes and the corresponding interfacial optimization strategies, failure mechanisms of electrochemical performance and advanced interfacial characterization technologies. It is hoped that this review can provide help for the in-depth understanding of the fundamental scientific issues in Si-based SSBs, further promoting the practical applications of Si-based SSBs in the near future.