废旧锂离子电池电解液回收研究进展

Research Progress on Electrolyte Recovery of Spent Lithium Ion Batteries

随着电子产品和电动汽车的快速发展,废旧锂离子电池增长快速。目前大多数研究都集中在废旧锂离子电池的正、负极材料回收上,而忽略了电解液的回收利用。电解液中的有机溶剂和电解质锂盐等物质具有较高的回收价值。文章概述了目前废旧锂离子电池电解液的回收处理方法的原理及应用,如高温热解法、蒸馏-冷凝法、化学法和超临界CO_(2)萃取法等,比较了不同回收方法的优缺点,并展望电解液回收工艺的发展方向。

With the rapid development of electronic products and electric vehicles,spent lithium-ion batteries grow rapidly.At present,most of the research focuses on the recovery of the positive and negative materials of spent lithium ion batteries,while ignoring the recovery and utilization of the electrolyte.Organic solvents and lithium salts in electrolyte have high recovery value.This paper summarized the principle and application of current recovery and treatment methods of spent lithium-ion battery electrolyte,including high-temperature thermolysis,distillation-condensation method,chemical method and supercritical CO_(2) extraction method,compared the advantages and disadvantages of different recovery methods,and look forward to the development direction of electrolyte recovery process.