湿法冶金2026，Vol.45Issue(2)：161-169,9.DOI:10.13355/j.cnki.sfyj.2026.02.004
低共熔溶剂浸出废旧锂离子电池正极材料的机制研究
Mechanism of Extracting Cathode Materials from Spent Lithium-ion Batteries Using Deep Eutectic Solvents
摘要
Abstract
The recycling of valuable metals from spent lithium-ion batteries has significant economic and environmental benefits.The preparation of a low-viscosity eutectic solvent(DES)with excellent reducing properties using choline chloride,citric acid and ethylene glycol was studied.The DES was characterized by FT-IR,NMR and TG,and was used for the leaching of ternary lithium(NCM)cathode materials.The coordination dissolution mechanism of DES leaching NCM cathode materials was investigated by XRD,UV-Vis and FT-IR spectra.The results show that under the optimal leaching conditions of ethylene glycol addition of 30％,leaching temperature of 100℃,leaching time of 90 min,and liquid-solid mass ratio of 50/1 for DES,the leaching rates of Li,Mn,Co,and Ni in the cathode material are 95.98％,96.73％,98.58％,and 96.31％,respectively.The metal ions in the leachate can be efficiently recovered through the co-precipitation of anhydrous oxalic acid,and the precipitation rate of transition metal ions such as Mn,Co and Ni can reach over 95％.This recycling method can provide certaion technical reference for the green recycling of used lithium-ion batteries.关键词
低共熔溶剂/废旧锂离子电池/正极材料/有价金属/绿色回收/溶解机制Key words
deep eutectic solvents/spent lithium-ion batteries/cathode materials/valuable metals/green recycling/dissolution mechanism分类
矿业与冶金引用本文复制引用
申鹏,丁全民,王越坤,刘虎,娄向阳,刘素云,梁永梅..低共熔溶剂浸出废旧锂离子电池正极材料的机制研究[J].湿法冶金,2026,45(2):161-169,9.基金项目
河北省高等学校科研项目青年拔尖人才项目(BJ2025079) （BJ2025079）
石家庄市驻冀高校重点研发计划项目(2510100901A) （2510100901A）
广东省教育厅项目(2023KTSCX323) （2023KTSCX323）
深圳信息职业技术大学项目(SZIIT2025KJ047). （SZIIT2025KJ047）
