低共熔溶剂高效回收废弃NCM523正极材料的研究  

Study on efficient recycling of spent NCM523 cathode materials by deep eutectic solvents

作　　者：王冲志 朱文杰[2] 罗永明 WANG Chongzhi;ZHU Wenjie;LUO Yongming(School of Chemical Engineering,Kunming University of Science and Technology,Kunming 650093,China;School of Environmental Science and Engineering,Kunming University of Science and Technology,Kunming 650500,China)

机构地区：[1]昆明理工大学化学工程学院,云南昆明650093 [2]昆明理工大学环境科学与工程学院,云南昆明650500

出　　处：《应用化工》2024年第10期2284-2288,共5页Applied Chemical Industry

基　　金：国家自然科学基金项目(22166021);云南省科技厅科技计划项目(202302AG050002)。

摘　　要：使用抗坏血酸、氯化胆碱和水成功制备了一种具有高还原性、低黏度的低共熔溶剂,采用红外光谱、核磁共振谱等对低共熔溶剂结构进行了表征,并用于NCM523正极材料回收研究。实验结果表明,低共熔溶剂在温和的条件下(60℃,20 min)即可对正极材料中镍(Ni)、钴(Co)、锰(Mn)和锂(Li)达到100%的浸出效率。浸出的金属离子通过共沉淀法可高效回收,镍、钴、锰等过渡金属离子的沉淀率超过90%。该回收方法操作便捷,成本低廉,可有效减少资源损耗以及环境污染。A deep eutectic solvent with high reducibility and low viscosity was successfully prepared by using ascorbic acid,choline chloride and water.Structural characterization of DES using infrared spectroscopy(FTIR)and nuclear magnetic resonance(NMR)spectroscopy for NCM523 cathode material recovery studies.The results show that the DES can achieve 100%extraction efficiency of nickel(Ni),cobalt(Co),manganese(Mn)and lithium(Li)from the cathode material under mild conditions(60℃,20 min).The leached metal ions can be efficiently recycling by the co-precipitation method.Precipitation efficiency of transition metal ions such as Ni,Co,Mn,etc.is more than 90%.The recycling method is simple and cost-effective and can effectively reduce resource depletion as well as environmental pollution.

关 键 词：低共熔溶剂 废弃锂离子电池 浸出 回收 

分 类 号：TQ421[化学工程] TQ152[冶金工程—有色金属冶金] TF815