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Influences of solution pH and redox potential on the bioleaching of LiCoO2 from spent lithium-ion batteries

Journal of the Korean Society for Applied Biological Chemistry volume 56, pages 187–192 (2013)Cite this article

Abstract

The influences of solution pH and redox potential on bioleaching of LiCoO2 from spent lithium-ion batteries using Acidithiobacillus ferrooxidans were investigated. Bioleaching at different initial pH and ferrous ion (Fe2+) concentrations were carried out, and electrochemical behavior of LiCoO2 dissolution was examined to study the effect of solution redox potential on the bioleaching process. The results showed maximum cobalt dissolution at initial pH of 1.5 and initial Fe2+ concentration of 35 g/L, and cobalt dissolution showed only slight relationship with pH of solution. Nonetheless, there was improvement of cobalt dissolution at higher redox potential. The cyclic voltammograms showed that dissolution rates increase when the solution potentials are higher than 0.4 V, and rapid decrease at 1.3 V. The anodic polarization curves indicated that the corrosion, primary passive, and passivation potentials were 0.420, 0.776 and 0.802 V, respectively.

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Authors and Affiliations

  1. Key Laboratory of Jiangxi Province for Persistant Pollutants Control and Resources Recycle, School of Environment and Chemical Engineering, Nanchang Hangkong University, Nanchang, 330063, China

    Lei Li, Gui-sheng Zeng, Sheng-lian Luo & Xiao-rong Deng

  2. College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China

    Gui-sheng Zeng & Sheng-lian Luo

  3. Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Hunan Normal University), Ministry of Education, Changsha, Hunan, 410081, China

    Gui-sheng Zeng & Qing-ji Xie

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  1. Lei Li
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  2. Gui-sheng Zeng
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  3. Sheng-lian Luo
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  4. Xiao-rong Deng
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  5. Qing-ji Xie
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Correspondence to Gui-sheng Zeng.

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Li, L., Zeng, Gs., Luo, Sl. et al. Influences of solution pH and redox potential on the bioleaching of LiCoO2 from spent lithium-ion batteries. J Korean Soc Appl Biol Chem 56, 187–192 (2013). https://doi.org/10.1007/s13765-013-3016-x

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  • DOI: https://doi.org/10.1007/s13765-013-3016-x

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