从废旧锂离子蓄电池中回收钴

对锂离子蓄电池正极材料钴酸锂的高需求及其高价格,推动了钴的湿法回收工艺的进步。优化了从废旧锂离子蓄电池中回收钴的湿法过程,根据铝钴膜废料的性质确定了回收流程:利用特殊有机溶剂溶解聚偏氟乙烯(PVDF),然后浸出滤渣,萃取浸出液并电解回收钴,得到完整、光亮、致密、表面形貌好的钴沉积物,含量为99.5%。

Cobalt recycling from lithium-ion spent secondary batteries

The increasing demand and expensive price on lithium-ion battery cathode material LiCoO2 have prompted the recovery progress of cobalt by hydrometallurgical processes.A hydrometallurgical process has been optimized for recovery of cobalt from spent lithium-ion secondary batteries.According to the property of lithium-ion secondary battery cathode wastes of Al-Co film,a simple process has been determined for recycling cobalt and aluminum:the application of special organic solvent in the treatment of used lithium-ion batteries aims at the dissolution of PVDF so that isolates LiCoO2 and aluminum,then leachs LiCoO2 and C,extracts of leach liquors by N235,electrowins of cobalt and at last recycles cobalt.The intact,bright and compact metallic deposit containing 99.5% cobalt was obtained which has a good surface through SEM.