In this review manuscript, the authors summarized the pre-treatment process of spent lithium ion batteries (LIBs), including storage, diagnosis, sorting, cell discharge methods, mechanical dismantling and black mass recovery. The merits of the physical separation are discussed. The practical challenges of recycling black mass in used LIBs are analyzed. In addition, an industry-viable mechanochemical separation process of electrode materials in a profitable and eco-friendly way is outlined. The in-depth insights and valuable prospects in the development of spent LIB recycling strategies will promote the sustainability of resources in LIBs and mitigate environmental pollution from hazardous e-waste. Therefore, I would like to recommend it for publication in RSC Sustainability after some minor revisions.
1. The latest research progress in separating technologies of electrode materials from spent LIBs is suggested to be summarized and analyzed.
2. The advantages and disadvantages of different strategies in recycling used LIBs are suggested to be contrasted.
3. The industrialization development trend of recycling spent LIBs is suggested to be further discussed.