1. Enabling the sustainable recycling of LiFePO4 from spent lithium-ion batteries.
- Author
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Qiu, Xuejing, Zhang, Baichao, Xu, Yunlong, Hu, Jiugang, Deng, Wentao, Zou, Guoqiang, Hou, Hongshuai, Yang, Yue, Sun, Wei, Hu, Yuehua, Cao, Xiaoyu, and Ji, Xiaobo
- Subjects
LITHIUM-ion batteries ,CHEMICAL reactions ,SUSTAINABLE chemistry ,BATTERY industry ,IRON ,HYDROGEN peroxide ,SUSTAINABILITY - Abstract
The recycling of spent lithium-ion batteries (LIBs) is a crucial issue that has engaged extensive attention worldwide, along with the rapidly increasing usage of lithium-ion batteries. State-of-art recycling approaches, in terms of chemical leaching, have imperfections such as excessive chemical consumption, tedious recycling procedure and aggravated secondary pollution. In this research, a green and closed-loop route for the recycling of spent LiFePO
4 involving oxidation leaching is demonstrated. By properly adjusting or controlling the leaching parameters, the leaching efficiency of lithium is up to 97.6% with the introduction of hydrogen peroxide, which is facilitated to achieve the transformed high-purity lithium carbonate and iron phosphate. The oxidation reaction mechanisms are clarified through thermodynamic and kinetic analyses, which identified that the oxidation leaching reaction is co-controlled by the internal diffusion and chemical reaction. Consequently, LiFePO4 cathode materials are regenerated by utilizing the obtained raw materials, as expected, which deliver superior cycling stability with less than 1% of capacity loss after 300 cycles and excellent rate performances. This research embodies the possibility of efficient recycling of LiFePO4 from spent lithium-ion batteries based on the principles of green chemistry that is possibly committed to the sustainability of the lithium-ion battery industry. [ABSTRACT FROM AUTHOR]- Published
- 2022
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