三元低共熔溶剂(氯化胆碱+乙二醇+苯甲酸)体系的物化性质及其在回收锂电池正极材料中的应用  

Physical and Chemical Properties of Ternary Low Eutectic Solvent System and Its Application in the Recovery of Lithium Battery Cathode Materials

作　　者：李印 李鑫[1] 乔骞 王坤 于洪浩[1] 李年平 孙园润 王炳天 邢文鹏 LI Yin;LI Xin;QIAO Qian;WANG Kun;YU Hong-hao;LI Nian-ping;SUN Yuan-run;WANG Bing-tian;XING Wen-peng(Shenyang Ligong University,Shenyang Liaoning 110158,China)

机构地区：[1]沈阳理工大学材料科学与工程学院,辽宁沈阳110158

出　　处：《辽宁化工》2023年第11期1553-1556,共4页Liaoning Chemical Industry

基　　金：国家自然科学基金项目(项目编号:U1360204、51304139);辽宁省自然基金项目(项目编号:2019-ZD-0258)。

摘　　要：制备了一种新型三元低共熔溶剂(氯化胆碱+乙二醇+苯甲酸)体系,在不同温度下测定了该体系的密度、熔点、黏度和电导率等物化性质。探讨了温度对黏度和电导率的影响以及黏度和电导率的关系。将三元低共熔溶剂在不同条件下进行了对锂电池正极材料的浸出实验,研究了该三元低共熔溶剂体系的物化性质对正极材料中钴浸出率的影响。结果表明:在氯化胆碱、乙二醇、苯甲酸的摩尔比为1∶1.6∶0.4、温度为160℃、时间为3 h的情况下,对钴的浸出率达到了98.88%。A new ternary low eutectic solvent(choline chloride+ethylene glycol+benzoic acid)system was prepared,and the physical and chemical properties of the system such as density,melting point,viscosity and conductivity were measured at different temperatures.The effects of temperature on viscosity and conductivity and the relationship between viscosity and conductivity were investigated.The leaching experiments of the ternary low eutectic solvent were carried out on the cathode material of lithium battery under different conditions,and the effects of the physicochemical properties of this ternary low eutectic solvent system on the leaching rate of cobalt from the cathode material were investigated.The experiments showed that the leaching rate of cobalt was 98.88%at the molar ratio of choline chloride,ethylene glycol,benzoic acid of 1∶1.6∶0.4,the temperature of 160℃and the time of 3 h.

关 键 词：三元低共熔溶剂 物化性质 正极材料 浸出率 

分 类 号：TQ413[化学工程]