Cite this article as: |
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.,(2023). https://doi.org/10.1007/s12613-023-2698-2 |
Lithium recovery from spent lithium-ion batteries (LIBs) becomes increasingly important due to the skyrocketing price of lithium. Medium-temperature carbon reduction roasting was reported in this work, which aimed at 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 99.10wt% of the whole lithium could be recovered as Li2CO3 with a purity of 99.55wt%. This study provided a new perspective on the preferentially selective extraction of lithium from spent lithium batteries.