Ammonia leaching mechanism and kinetics of LiCoO2 material from spent lithium-ion batteries |
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| Authors: | Dongmin Li Bao Zhang Xing Ou Jiafeng Zhang Kui Meng Guanjun Ji Pengfei Li Jianhui Xu |
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| Institution: | 1. School of Metallurgy and Environment, Central South University, Changsha 410083, China;2. College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China;3. School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan 523808, China |
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| Abstract: | 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. |
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| Keywords: | Recycling Ammonia leaching High-energy ball milling Lithium-ion batteries |
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