新型低共熔溶剂法回收锂电池钴酸锂正极材料  

Novel Deep Eutectic Solvent Method to Recover Lithium Cobaltate Cathode Material from Lithium Batteries

作　　者：李龙吉 王文谦 赵奕为 LI Long-ji;WANG Wen-qian;ZHAO Yi-wei(Harbin Institute of Technology(Shenzhen),Guangdong Shenzhen 518055,China)

机构地区：[1]哈尔滨工业大学(深圳),广东深圳518055

出　　处：《广州化工》2023年第3期86-88,共3页GuangZhou Chemical Industry

基　　金：广东省科技创新战略专项资金立项项目(pdjh2021b0552)。

摘　　要：研究了废旧锂电池中钴资源的回收利用。本论文报导了一种氯化胆碱-丙二酸型低共熔溶剂耦合碳酸钠滴定沉淀的方法。实验表明,氯化胆碱与丙二酸的摩尔比例为1∶1时形成的DES对钴酸锂的溶解效果最好。DES在90℃的加热条件下可实现对钴酸锂较好的溶解。通过碳酸钠沉淀滴定可获得较高纯度的含钴沉淀。定量计算后得出钴酸锂中钴的提取率达到83.4%,较好地实现了对废旧锂电池钴酸锂正极材料中钴成分的回收利用。The recycling of cobalt resources in waste lithium batteries was studied.A method of choline chloride-malonic acid type low eutectic solvent coupled with sodium carbonate titration precipitation was reported.The experiment showed that the best dissolution effect of lithium cobaltate was DES formed when the molar ratio of choline chloride to malonic acid was 1∶1.DES could achieve good dissolution of lithium cobalt under the heating condition of 90℃.Cobalt-containing precipitation with high purity could be obtained by sodium carbonate precipitation titration.After quantitative calculation,the extraction rate of cobalt in lithium cobaltate reached 83.4%,which better realized the recovery and utilization of cobalt in waste lithium battery lithium cobaltate cathode material.

关 键 词：锂电池回收 钴酸锂 低共熔溶剂 氯化胆碱 丙二酸 碳酸钠滴定 

分 类 号：TF803.21[冶金工程—有色金属冶金]