Lithium-ion batteries (LIBs) have attracted increasing attention for electrical energy storage applications in recent years due to their excellent electrochemical performance. The unprecedented growth trajectory in lithium-ion battery manufacturing perpetuated by the inception of electric vehicles (EV) results in a vast amount of spent LIBs reaching their end of life (EOL). From the perspective of resource circulation, procurement, and sustainability with an insight into the circular economy, an effective recycling system must be developed to recycle the spent LIBs. This paper provides a comprehensive overview of the current status of pyrometallurgical options for recycling spent LIBs. In particular, this study summarizes the thermal pretreatment methods used to recover the active cathode material and then discusses the developed extractive pyrometallurgical options for recycling spent LIBs. A summary is presented on some recent examples of laboratory and industrial-scale recycling processes to demonstrate the practical applications of pyrometallurgical options for recycling. Finally, the review sheds light on the battery recycling legislation, and challenges and future outlook for recycling LIBs are also discussed.

锂离子电池（LIB）由于其出色的电化学性能，近年来在电能存储应用中引起了越来越多的关注。电动汽车（EV）诞生后，锂离子电池制造业就出现了前所未有的增长轨迹，导致大量用完的LIB达到使用寿命（EOL）。从资源循环，采购和可持续发展的角度，以及对循环经济的洞察力，必须开发有效的回收系统来回收用过的LIB。本文全面概述了回收废旧LIB的火法冶金技术现状。特别是，这项研究总结了用于回收活性阴极材料的热预处理方法，然后讨论了用于回收废旧LIB的已开发的火法提取方法。总结了实验室和工业规模回收过程的一些最新实例，以说明火法冶金回收方法的实际应用。最后，该审查揭示了电池回收立法，并讨论了回收LIB的挑战和未来前景。