Feng Jin, Zhang Beilei, Du Pin, Yuan Yahong, Li Mengting, Chen Xiang, Guo Yanyang, Xie Hongwei, Yin Huayi
Key Laboratory for Ecological Metallurgy of Multimetallic Mineral of Ministry of Education, School of Metallurgy, Northeastern University, 11 Wenhua Road, Heping District, Shenyang 110819, P.R. China.
School of Materials Science and Engineering, Henan Normal University, Xinxiang 453007, P.R. China.
iScience. 2023 Sep 30;26(11):108097. doi: 10.1016/j.isci.2023.108097. eCollection 2023 Nov 17.
The recovery of spent lithium-ion batteries has not only economic value but also ecological benefits. In this paper, molten-salt electrolysis was employed to recover spent LiCoO batteries, in which NaCl-NaCO melts were used as the electrolyte, the graphite rod and the mixtures of the spent LiCoO cathode and anode were used as the anode and cathode, respectively. During the electrolysis, the LiCoO was electrochemically reduced to Co, and Li and O entered into the molten salt. The O was discharged at the anode to generate CO and formed LiCO. After electrolysis, the cathodic products were separated by magnetic separation to obtain Co and graphite, and LiCO was recovered by water leaching. The recovery efficiencies of Li, Co, and graphite reached 99.3%, 98.1%, and 83.6%, respectively. Overall, this paper provides a simple and efficient electrochemical method for the simultaneous recovery of the cathode and the anode of spent LiCoO batteries.
废旧锂离子电池的回收不仅具有经济价值，还具有生态效益。本文采用熔盐电解法回收废旧LiCoO电池，其中以NaCl-NaCO熔体作为电解质，分别以石墨棒和废旧LiCoO正极与负极的混合物作为阳极和阴极。在电解过程中，LiCoO被电化学还原为Co，Li和O进入熔盐。O在阳极放电生成CO并形成LiCO。电解后，通过磁选分离阴极产物以获得Co和石墨，并通过水浸出回收LiCO。Li、Co和石墨的回收效率分别达到99.3%、98.1%和83.6%。总体而言，本文提供了一种简单高效的电化学方法，用于同时回收废旧LiCoO电池的正极和负极。
