Haijun Yu, Dongxing Wang, Shuai Rao, Lijuan Duan, Cairu Shao, Xiaohui Tu, Zhiyuan Ma, Hongyang Cao, and Zhiqiang Liu, Selective leaching of lithium from spent lithium-ion batteries using sulfuric acid and oxalic acid, Int. J. Miner. Metall. Mater.,(2023). https://doi.org/10.1007/s12613-023-2741-3
Cite this article as:
Haijun Yu, Dongxing Wang, Shuai Rao, Lijuan Duan, Cairu Shao, Xiaohui Tu, Zhiyuan Ma, Hongyang Cao, and Zhiqiang Liu, Selective leaching of lithium from spent lithium-ion batteries using sulfuric acid and oxalic acid, Int. J. Miner. Metall. Mater.,(2023). https://doi.org/10.1007/s12613-023-2741-3
Research Article

Selective leaching of lithium from spent lithium-ion batteries using sulfuric acid and oxalic acid

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  • Received: 13 July 2023Revised: 5 September 2023Accepted: 8 September 2023Available online: 9 September 2023
  • Traditional hydrometallurgical methods for recovering spent lithium-ion batteries involve acid leaching to simultaneously extract all valuable metals into the leachate. This is followed by a series of separation steps such as precipitation, extraction, and stripping to separate the individual valuable metals. These processes are time-consuming and result in high lithium loss rates due to its late recovery stage. In this study, we present a process for selectively leaching lithium through the synergistic effect of sulfuric and oxalic acids. Under optimal leaching conditions (leaching time of 1.5 h, leaching temperature of 70 °C, liquid-solid ratio of 4 mL/g, sulfuric acid: oxalic acid = 1.3:1.3), the lithium leaching efficiency reached 89.6%, with good selectivity. XRD and ICP-OES analyses showed that most of the Ni, Co, and Mn in the raw material remained as oxides and oxalates in the residue. This study offers a new approach to enriching the relevant theory for the selective preferential leaching process of lithium.

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