摘要
提出了一种基于湿法冶金的废旧锂离子电池整体回收的新工艺。给出了浸碱除铝,以及使用硫酸和过氧化氢混合体系溶解废旧锂离子电极材料的前处理条件,然后分别使用萃取剂AcorgaM5640和Cyanex272萃取铜和钴,并给出了合适的萃取工艺条件。采用此工艺,铜的回收率可达98%,钴的回收率可达97%。使用回收的硫酸钴和碳酸锂作为前驱体,制备出了具有较好放电性能的钴酸锂电极材料。
A new solvent extraction flowsheet for humidity recovery of spent Li-ion batteries was proposed.The optimized conditions for leaching spent Li-ion secondary batteries with alkaline solution and dissolving the residues with sulphuric acid and peroxide were demonstrated. In the process Acorga M5640 and Cyanex272 were used as extractant for copper and cobalt, respectively. As the special extractant for copper, Acorga M5640 was first used as extractant for copper in sulphate solution. It proved that two extractants were more efficient and selective than other ones. The reaction conditions of extraction were optimized, over 98% of the copper and 97% of the cobalt were recovered under the optimized conditions. The recovered products of cobalt could be used as raw material to synthesize LiCoO_2, the positive electrode materials with good electrochemical performance.
出处
《电池》
CAS
CSCD
北大核心
2004年第4期309-311,共3页
Battery Bimonthly
基金
广东省科技攻关课题(2002C31628
2003C105003)
关键词
锂离子电池
回收利用
溶剂萃取
铜
钴
Li-ion batteries
humidity recovery
solvent extraction
copper
cobalt
