期刊
NATIONAL SCIENCE REVIEW
卷 9, 期 8, 页码 -出版社
OXFORD UNIV PRESS
DOI: 10.1093/nsr/nwac097
关键词
spent cathodes; lithium-ion batteries; LiCoO2; direct repair; deep eutectic solvent; lattice distortion
资金
- National Key Research and Development Program of China [2019YFA0705700, 2021YFB2500200]
- National Natural Science Foundation of China [52072205]
- Interdisciplinary Research and Innovation Fund of Tsinghua Shenzhen International Graduate School
- Qinhe Energy Conservation and Environmental Protection Group Co., Ltd. [QHHB-20210405]
- Shanghai Jiao Tong University
This work presents a novel direct recycling method using a sustainable deep eutectic solvent to regenerate degraded cathode materials of spent lithium-ion batteries. The method enables efficient repair and sustainable reuse of the materials, while reducing energy consumption and greenhouse gas emissions.
This work provides a novel direct recycling method based on a sustainable lithium-containing deep eutectic solvent to regenerate degraded cathode materials of spent lithium-ion batteries. Traditional recycling processes of LiCoO2 rely 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 LiCoO2 using a LiCl-CH4N2O deep eutectic solvent (DES) was established. The DES is not used to dissolve LiCoO2 but directly serves as a carrier for the selective replenishment of lithium and cobalt. Replenishment of lithium restores LiCoO2 at different states of charge to a capacity of 130 mAh/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.
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