Advancements in Recycling and Regeneration Technologies for Solid‐State Batteries: Challenges, Strategies, and Directions

Currently, traditional recycling technologies for lithium‐ion batteries (LIBs) are relatively mature, but their process pathways are difficult to adapt to the recycling needs of next‐generation high‐performance solid‐state batteries (SSBs). As the global energy transition accelerates, SSBs are experiencing explosive growth due to their ultra‐high energy density and inherent safety advantages. However, the large‐scale industrialization of SSBs faces dual challenges: imbalances in the supply and demand of critical metal resources and heavy metal pollution from retired batteries. Compared with LIBs, SSBs have fundamental differences in material systems and the difficulty of solid–solid interface dissociation, and their recycling strategies are still in the early stages of exploration, with no closed‐loop regeneration system yet established that is compatible with their material characteristics. This review systematically compares the fundamental differences between SSBs and LIBs in terms of recycling technology pathways, integrating innovative recycling and potential regeneration pathways for SSB cathode materials, various types of solid‐state electrolytes (SSEs), and anode materials. It also outlines the future trends in SSB recycling technology toward multistrategy collaboration and standardized systems, laying the theoretical foundation for establishing an efficient, low‐carbon, high‐value industrial‐scale recycling system for the comprehensive regeneration of all components of SSBs.