Preferentially selective extraction of lithium from spent LiCoO<sub>2</sub> cathodes by medium-temperature carbon reduction roasting

Daixiang Wei; Wei Wang; Longjin Jiang; Zhidong Chang; Hualei Zhou; Bin Dong; Dekun Gao; Minghui Zhang; Chaofan Wu

doi:10.1007/s12613-023-2698-2

Volume 31 Issue 2

Feb. 2024

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2024 > 31(2): 315-322

Daixiang Wei, Wei Wang, Longjin Jiang, Zhidong Chang, Hualei Zhou, Bin Dong, Dekun Gao, Minghui Zhang, and Chaofan Wu, Preferentially selective extraction of lithium from spent LiCoO₂ cathodes by medium-temperature carbon reduction roasting, Int. J. Miner. Metall. Mater., 31(2024), No. 2, pp. 315-322. https://doi.org/10.1007/s12613-023-2698-2

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Daixiang Wei, Wei Wang, Longjin Jiang, Zhidong Chang, Hualei Zhou, Bin Dong, Dekun Gao, Minghui Zhang, and Chaofan Wu, Preferentially selective extraction of lithium from spent LiCoO2 cathodes by medium-temperature carbon reduction roasting, Int. J. Miner. Metall. Mater., 31(2024), No. 2, pp. 315-322. https://doi.org/10.1007/s12613-023-2698-2

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Research Article

Preferentially selective extraction of lithium from spent LiCoO₂ cathodes by medium-temperature carbon reduction roasting

+ Author Affiliations

Corresponding authors:
Wei Wang E-mail: weiwang@ipe.ac.cn

Zhidong Chang E-mail: zdchang@ustb.edu.cn
Received: 27 February 2023; Revised: 25 June 2023; Accepted: 28 June 2023; Available online: 30 June 2023

Abstract

Abstract

Lithium recovery from spent lithium-ion batteries (LIBs) have attracted extensive attention due to the skyrocketing price of lithium. The medium-temperature carbon reduction roasting was proposed to preferential selective extraction of lithium from spent LiCoO₂ (LCO) cathodes to overcome the incomplete recovery and loss of lithium during the recycling process. The LCO layered structure was destroyed and lithium was completely converted into water-soluble Li₂CO₃ under a suitable temperature to control the reduced state of the cobalt oxide. The Co metal agglomerates generated during medium-temperature carbon reduction roasting were broken by wet grinding and ultrasonic crushing to release the entrained lithium. The results showed that 99.10% of the whole lithium could be recovered as Li₂CO₃ with a purity of 99.55%. This work provided a new perspective on the preferentially selective extraction of lithium from spent lithium batteries.
- spent LiCoO₂ cathodes;
- medium-temperature carbon reduction;
- lithium extraction priority;
- crystal transformation;
- macroscopic transport resistance

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