One-step selective separation and efficient recovery of valuable metals from spent lithium batteries by phosphoric acid-based deep eutectic solvent

作     者：Yuning Zhang Peng Cui Guiling Luo Linlin Chen Xiaowei Li Yanhong Chao Wenshuai Zhu 

作者机构：School of Chemistry and Chemical Engineering Jiangsu University College of Science State Key Laboratory of Heavy Oil Processing China University of Petroleum-Beijing College of Chemical Engineering and Environment State Key Laboratory of Heavy Oil Processing China University of Petroleum-Beijing 

出 版 物：《Green Chemical Engineering》 (绿色化学工程(英文))

年 卷 期：2024年第5卷第3期

页      面：390-398页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 080603[工学-有色金属冶金] 0817[工学-化学工程与技术] 08[工学] 0806[工学-冶金工程] 

基　　金：the financial support for the financial supports from the National Natural Science Foundation of China (grant Nos. 21908082, 22278426, 21878133, and 22178154) the Natural Science Foundation of Jiangsu Province (BK20190854) Jiangsu Funding Program for Excellent Postdoctoral Talent (2022ZB629) the China Postdoctoral Science Foundation (2021M701472) 

主　　题：Spent lithium-ion batteries Phosphoric acid-based deep eutectic solvent One-step separation Regenerate 

摘      要：With more and more lithium-ion batteries(LIBs) being put into production and application, precious metals such as lithium and cobalt are scarce, so it is imminent to recover various strategic metal resources from spent ***, the complex and difficult problem of separating and recovering metals from leaching solutions has been an urgent question that needs to be resolved. In this work, a phosphoric acid-based deep eutectic solvent(DES) was developed for extracting metals from spent LIBs and one-step selectively separating and efficiently recovering transition metal. The prepared DES shows excellent extraction performance for Li(100%) and Co(92.8%) at 100°C. In addition, the extraction system can effectively separate and precipitate Co through its own components, avoiding the introduction of new precipitants and the destruction of the original composition structure of DES. This also contributes to the good cycle stability of the extraction system with excellent extraction performance for Li(94.3%) and Co(80.8%) after 5 cycles. This work proposes a green method for one-step selectively separating and recovering valuable metals from spent LIBs.