废旧锂离子电池正负极混合物氨浸液电沉积研究

Study on Electro-deposition of Ammonia Leaching Solution of Waste Lithium Ion Batteries Cathode and Anode Mixture

利用电沉积法处理废旧锂离子电池正负极混合物氨浸液,考察了电流对电沉积过程中金属钴、锂、镍、铜的回收率,阴极金属粉末中金属分布率、物相与形貌的影响。结果表明,随着电流的升高,金属钴、镍和铜的回收率总体呈升高趋势,而锂的回收率总体较低,当电流为1.0 A时,钴、镍、铜和锂的回收率分别为98.15%、99.11%、99.91%和15.36%。阴极金属粉末中钴的占比最大,最高占比可达80.71%。电流大小对阴极金属粉末的XRD物相影响不大。从阴极金属粉末微观形貌来看,提高电流有利于减小阴极粉末的粒径。

Ammonia leaching solution of waste lithium ion batteries(LIBs)cathode and anode mixture was treated by electro-deposition.Effects of current on recovery of cobalt,lithium,nickel and copper,and distribution rate,phase and micromorphology during electro-deposition were investigated.The results show that recovery rate of cobalt,nickel and copper rises with increase of current,however,lithium recovery is lower in general.Recovery rate of cobalt,nickel,copper and lithium is 98.15%,99.11%,99.91%and 15.36%,respectively when current is 1.0 A.Co in obtained metal powders is the highest of 80.71%.Current has little effect on XRD patterns of metal powders.Based on micromorphology of metal powders,higher current is beneficial to reducing particle size of metal powders.