【摘要】 废旧锂离子电池含有大量的钴、铜等紧缺有色金属元素和六氟磷酸锂等有毒有害物质,必须对其进行资源化回收及无害化处理.本文采用"拆解→NMP浸泡正极材料→钴酸锂粉末的浸出→P204萃取除杂→P507萃取分离钴、锂离子"流程处理废旧锂离子电池,获得了合格的氯化钴溶液.该工艺的特点在于:正极片中的铝箔以单质形态回收,而正极材料中97.33%的钴以氯化钴的形式回收,成功地实现了锂离子电池正极材料中有色金属的分离与回收利用.更多还原

【Abstract】 Spent lithium-ion secondary batteries contain amounts of scarce non-ferrous metals as Co,Cu and toxic substance LiPF6,so the recovery of spent lithium-ion secondary battery and innocent treatment are necessary and beneficial.In this paper,a recovery procedure of spent lithium-ion secondary battery is proposed as follows:"splitting →pretreating the positive electrode material with NMP →leaching the cobalt in positive electrode material→ removing impurities extracted with P204 →separating cobalt ion from lithium ion extracted with P507",obtaining qualified cobalt chloride solution.The characteristics of this process flow are:the aluminum foil in positive electrode material is recovered as simple substance,and the recovery rate of cobalt in the positive electrode material is 97.33% in form of cobalt chloride solution,which has a good effect on the separation and recovery of non-ferrous metals in spent lithium-ion secondary batteries positive electrode material.更多还原