Ammonia leaching mechanism and kinetics of LiCoO2 material from spent lithium-ion batteries

• 作者: Dongmin Li Bao Zhang Xing Ou Jiafeng Zhang Kui Meng Guanjun Ji Pengfei Li Jianhui Xu
• 来源期刊: 中国化学快报（英文版）
• 年，卷（期）: 2021,（7）
• 所属期刊栏目: Communications
• 页码范围: 2333-2337
• 页数: 5页
• 语种: 英文

摘要

In this paper, the ammonia leaching process and high-energy ball milling method were adapted to recover spent LiCoO2 material. The ammonia reduction leaching mechanism of LiCoO2 material in the ammonia-sodium sulfite-ammonium chloride system was elucidated. Compared with untreated LiCoO2 material, the leaching equilibrium time of LiCoO2 after ball-milled for 5 h was reduced from 48 h to 4 h, and the leaching efficiency of lithium and cobalt was improved from 69.86％and 70.80％to 89.86％and 98.22％, respectively. Importantly, the apparent activation energy and leaching kinetic equation of the reaction was calculated by the shrinking core reaction model, indicating that the reaction was controlled by the chemical reaction.