Study on the Leaching of LiCoO2 in Low H2SO4 Concentration Solutions

Yong Qiang Yang; Cheng Yan Wang; Dun Fang Li; Fei Yin; Yong Qiang Chen; Xiao Wu Jie

doi:10.4028/www.scientific.net/AMR.201-203.1752

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 201-203Study on the Leaching of LiCoO2 in Low H2SO4...

Study on the Leaching of LiCoO₂ in Low H₂SO₄ Concentration Solutions

Abstract:

The leaching behavior of battery grade lithium cobalt oxide (LiCoO₂) was studied in Na₂SO₃-H₂SO₄ aqueous solutions with low H₂SO₄ concentration. The effects of H₂SO₄ concentration, leaching time, leaching temperature, and dosage of Na₂SO₃ on the leaching rate of LiCoO₂ were investigated. The experimental results show that all the cobalt in LiCoO₂ can be dissolved in the following conditions: the H₂SO₄ concentration of 0.4 mol/L, the leaching time of 0.5 h, the leaching temperature of 70°C and the Na₂SO₃ dosage being equal to the weight of LiCoO₂. It is proved that the leaching of LiCoO₂ in the system of Na₂SO₃-H₂SO₄ solutions is much more effective than that in other leaching systems. Moreover, the consumption of H₂SO₄ can be lowered greatly. Based on the leaching of pure LiCoO₂, the Na₂SO₃-H₂SO₄ leaching system is further applied in the treatment of spent Li-ion battery and the leaching rate of cobalt can be achieved as higher as more than 98%.

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Periodical:

Advanced Materials Research (Volumes 201-203)

Pages:

1752-1756

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.201-203.1752

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Online since:

February 2011

Authors:

Yong Qiang Yang, Cheng Yan Wang, Dun Fang Li, Fei Yin, Yong Qiang Chen, Xiao Wu Jie

Keywords:

Leaching, Lithium Cobalt Oxide, Sodium Sulphite, Spent Lithium-Ion Battery

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