文献类型：期刊文献

英文题名：Self-actuated leaching and integrated separation of spent lithium-ion batteries cathode and anode sheets

作者：He, Ting[1];Zhao, Jixing[1];Chen, Dongxian[1];Gu, Shuai[1,2];Yu, Jianguo[1,2]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Integrated Utilizat Salt Lake Re, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Joint Int Lab Potassium & Lithium Strateg Resource, Shanghai 200237, Peoples R China

年份：2024

卷号：345

外文期刊名：SEPARATION AND PURIFICATION TECHNOLOGY

收录：;EI(收录号：20240108177);WOS:【SCI-EXPANDED(收录号:WOS:001227416000001)】；

基金：This research is sponsored by the Shanghai Sailing Program (Grant number 21YF1409000) , the Natural Science Foundation of Shanghai (Grant number 22ZR1415800) , and the National Natural Science Foundation of China (Grant number 52304422) .

语种：英文

外文关键词：Spent lithium-ion batteries; Self-actuated leaching; Extraction; Electrochemical leaching; Recycling

摘要：The heavy metals in spent lithium-ion batteries (LIBs) are potential safety hazards to the environment. Conventional hydrometallurgical recovery techniques suffer from both economic and environmental challenges. Here, a novel two-step leaching and solvent extraction process are proposed to improve the leaching efficiencies and achieve the integrated leaching of LIBs cathode and anode sheets. The current collector (Al) enables the selfactuated enhanced leaching of the spent cathode sheet, the leaching efficiencies of Al3+, Li+, and Co2+ are 100 %, 71.29 %, and 63.53 %, respectively, under 0.4 M HCl and 40 min without external energy input. With di-(2ethylhexyl)phosphoric acid (D2EHPA), 98.99 % Al3+ can be selectively extracted from the leachate. The following electrochemical leaching of both spent cathode residual and spent anode sheet is carried out at low cell voltage, 99.8 % Li+, and 99.69 % Co2+ can be obtained in 90 min. Meanwhile, Al(OH)3, Co(OH)2, Li2CO3, and Cu are obtained from spent cathode and anode sheets with high crystallinity and purity, respectively. This strategy provides novel approaches for the integrated recycling of spent LIBs, thus realizing an environmentally friendly process with more application potential.