Preferentially selective extraction of lithium from spent LiCoO2 cathodes by medium-temperature carbon reduction roasting
- Resource Type
- Original Paper
- Authors
- Wei, Daixiang; Wang, Wei; Jiang, Longjin; Chang, Zhidong; Zhou, Hualei; Dong, Bin; Gao, Dekun; Zhang, Minghui; Wu, Chaofan
- Source
- International Journal of Minerals, Metallurgy and Materials. 31(2):315-322
- Subject
- spent LiCoO2 cathodes
medium-temperature carbon reduction
lithium extraction priority
crystal transformation
macroscopic transport resistance
- Language
- English
- ISSN
- 1674-4799
1869-103X
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 Li-CoO2 (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.