Direct and green repairing of degraded LiCoO2 for reuse in lithium-ion batteries

作     者：Junxiong Wang Qi Zhang Jinzhi Sheng Zheng Liang Jun Ma Yuanmao Chen Guangmin Zhou Hui-Ming Cheng Junxiong Wang;Qi Zhang;Jinzhi Sheng;Zheng Liang;Jun Ma;Yuanmao Chen;Guangmin Zhou;Hui-Ming Cheng

作者机构：Shenzhen Geim Graphene CenterTsinghua-Berkeley Shenzhen Institute&Tsinghua Shenzhen International Graduate SchoolTsinghua University Frontiers Science Center for Transformative MoleculesSchool of Chemistry and Chemical EngineeringShanghai Jiao Tong University Faculty of Materials Science and Engineering/Institute of Technology for Carbon NeutralityShenzhen Institute of Advanced TechnologyChinese Academy of Sciences 

出 版 物：《National Science Review》 (国家科学评论(英文版))

年 卷 期：2022年第9卷第8期

页      面：127-137页

核心收录：

学科分类：081702[工学-化学工艺] 0808[工学-电气工程] 08[工学] 0817[工学-化学工程与技术] 

基　　金：supported by the National Key Research and Development Program of China (2019YFA0705700 and 2021YFB2500200) the National Natural Science Foundation of China (52072205) the Interdisciplinary Research and Innovation Fund of Tsinghua Shenzhen International Graduate School the Qinhe Energy Conservation and Environmental Protection Group Co.,Ltd.(QHHB-20210405) the start-up funds of Shanghai Jiao Tong University 

主　　题：spent cathodes lithium-ion batteries LiCoO2 direct repair deep eutectic solvent lattice distortion 

摘      要：Traditional recycling processes of LiCoO2rely on destructive decomposition, requiring high-temperature roasting or acid leaching to extract valuable Li and Co, which have significant environmental and economic concerns. Herein, a direct repairing method for degraded LiCoO2using a LiCl–CH4N2O deep eutectic solvent（DES） was established. The DES is not used to dissolve LiCoO2but directly serves as a carrier for the selective replenishment of lithium and cobalt. Replenishment of lithium restores LiCoO2at different states of charge to a capacity of 130 m Ah/g（at 0.1 C rate）, while replenishing the cobalt increases the capacity retention rate of 90% after 100 cycles, which is comparable to pristine LiCoO2. The DES is collected and reused multiple times with a high repair efficiency. This process reduces energy consumption by 37.1% and greenhouse gas emissions by 34.8% compared with the current production process of LiCoO2, demonstrating excellent environmental and economic viability.