乳酸基低共熔溶剂浸出废旧LiFePO_(4)动力电池正极材料金属离子的研究  

Research on Leaching Metal-ions from Spent LiFePO_(4) Battery Positive Electrode Materials Using Lactic Acid-Based Deep Eutectic Solvents

作　　者：袁彰 金建交 吴良芹[1] 张晨韵 YUAN Zhang;JIN Jianjiao;WU Liangqin;ZHANG Chenyun(Intelligent Manufacturing College,Shazhou Professional Institute of Technology,Zhangjiagang 215600,China;Ceramic Institute,Wuxi Vocational Institute of Arts&Technology,Yixing 214200,China)

机构地区：[1]沙洲职业工学院智能制造学院,江苏张家港215600 [2]无锡工艺职业技术学院陶瓷学院,江苏宜兴214200

出　　处：《汽车实用技术》2024年第23期11-15,共5页Automobile Applied Technology

基　　金：江苏省职业院校学生创新创业培育计划项目(G-2023-1362);江苏省高等学校自然科学面上研究项目(22KJB150042);江苏省教育规划课题青年专项(C/2022/01/48)。

摘　　要：低共熔溶剂作为一种新型的绿色溶剂,在化学、生物、材料等领域展现出广泛的应用前景。文章以废旧磷酸铁锂电池正极材料为对象,研究了氯化胆碱(ChCl)、乳酸(LA)和H_(2)O制备的低共熔溶剂对其金属离子的浸出效果。探索了ChCl/LA摩尔比、固液比、浸出温度及时间等因素对正极材料中锂和铁的浸出效果。研究结果表明在最佳浸出因子为ChCl/LA摩尔比1:3、固液比1:100、浸出温度140℃、浸出时间8 h的条件下,锂和铁的浸出率分别可达92.98%和94.57%。Deep eutectic solvents,as a new type of green solvent,have shown wide application prospects various fields such as chemistry,biology and material.This study focuses on the positive electrode material of spent lithium-iron phosphate batteries and investigated the leaching effect of metal ions using a deep eutectic solvent prepared with choline chloride(ChCl),lactic acid(LA),and H_(2)O.The leaching effect Li and Fe in the positive electrode was explored by factors such as ChCl/LA molar ratio,solid-liquid ratio,leaching temperature and time.The research results show that under the optimal leaching conditions of ChCl/LA molar ratio of 1:3,solid-liquid ratio of 1:100,leaching temperature of 140℃,and leaching time of 8 h,the leaching rates of Li and Fe reached 92.98%and 94.57%,respectively.

关 键 词：废旧LiFePO_(4)电池 正极材料 低共熔溶剂 浸出率 

分 类 号：U469.7[机械工程—车辆工程] TK05[交通运输工程—载运工具运用工程]