A copper-catalyzed bioleaching process for enhancement of cobalt dissolution from spent lithium-ion batteries

作者：Zeng, Guisheng^*; Deng, Xiaorong; Luo, Shenglian; Luo, Xubiao; Zou, Jianping

来源：Journal of Hazardous Materials, 2012, 199: 164-169.

DOI：10.1016/j.jhazmat.2011.10.063

• Spent lithium-ion batteries
• Bioleaching
• Copper ion
• Catalyst

A copper-catalyzed bioleaching process was developed to recycle cobalt from spent lithium-ion batteries (mainly LiCoO2) in this paper. The influence of copper ions on bioleaching of LiCoO2 by Acidithiobacillus ferrooxidans (A.f) was investigated. It was shown that almost all cobalt (99.9%) went into solution after being bioleached for 6 days in the presence of 0.75 g/L. copper ions, while only 43.1% of cobalt dissolution was obtained after 10 days without copper ions. EDX, XRD and SEM analyses additionally confirmed that the cobalt dissolution from spent lithium-ion batteries could be improved in the presence of copper ions. The catalytic mechanism was investigated to explain the enhancement of cobalt dissolution by copper ions, in which LiCoO2 underwent a cationic interchange reaction with copper ions to form CuCo2O4 on the surface of the sample, which could be easily dissolved by Fe3+.

• 出版日期2012-1-15
• 单位湖南大学; 南昌航空大学