土木与环境工程学报（中英文）2024，Vol.46Issue(6)：213-220,8.DOI:10.11835/j.issn.2096-6717.2023.120
丙二酸-抗坏血酸协同浸出废旧三元电池有价金属的方法
Synergistic leaching of valuable metals from waste ternary batteries with malonic acid and ascorbic acid
摘要
Abstract
In recent years,the demand for lithium-ion batteries(LIB)has grown rapidly,but many basic elements in the positive electrode,such as lithium,cobalt,and nickel,are expensive and heavily dependent on imports.At present,most hydrometallurgical leaching methods are based on the use of an"in/organic acid+H2O2"system,but there are environmental pollution,safety hazards,and efficiency issues.Therefore,this study proposes a new environmentally friendly,safe,and efficient leaching process using malonic acid and ascorbic acid as leaching and reducing agents.Under the optimal conditions:malonic acid concentration of 0.4 mol/L,ascorbic acid concentration of 0.2 mol/L,solid-liquid ratio of 30 g/L,leaching temperature of 50℃,and leaching time of 50 minutes;the leaching rates of lithium,nickel,cobalt,and manganese are all more than 95%.The kinetic fitting validation results indicate that the leaching process conforms to the"shrinking core model"and the apparent activation energy is lower than the previous values of"organic acid+H2O2";therefore,the addition of ascorbic acid can effectively promote the leaching of valuable metals from positive electrode materials with malonic acid,thereby improving the leaching efficiency;the infrared spectrum and XRD results indicate that the coordination form between malonic acid and transition metals during the leaching process is C3H2O4M(M is transition metals Ni,Co,Mn).关键词
锂离子电池/湿法冶金/丙二酸/抗坏血酸Key words
lithium-ion batteries/hydrometallurgy/malonic acid/ascorbic acid分类
资源环境引用本文复制引用
李涌,周鸿波,赵建树,臧曦,马科壹,张佳峰,何頔..丙二酸-抗坏血酸协同浸出废旧三元电池有价金属的方法[J].土木与环境工程学报（中英文）,2024,46(6):213-220,8.基金项目
中组部海外高层次青年人才项目(40210082) Overseas High-Level Youth Talent Project of the Organization Department of the CPC Central Committee(No.40210082) （40210082）
