Advance technology for treatment and recycling of electrolyte and organic matters from spent lithium-ion battery

Most studies nowadays focus on the recovery of precious metals in cathode from spent lithium-ion batteries (LIBs), neglecting the recycling of electrolyte and organic matters. The electrolyte and organic matters from spent LIBs can be converted into resources through component separation and regeneration, which brings certain economic benefits. In this review, the domestic and foreign pretreatment technologies of electrolyte from spent LIBs, such as high-temperature pyrolysis, solvent extraction, and supercritical CO₂ extraction, are summarized, and the advantages and disadvantages of different pretreatment technologies are compared. In addition, the research progress of high-value utilization of electrolytes, separators, and binders are reviewed, and the development directions of the recycling process of electrolyte and organic matters are prospected.