Recovery of Li and Co in Waste Lithium Cobalt Oxide-Based Battery Using H1.6Mn1.6O4

Hua Wang; Guangzhou Chen; Lijie Mo; Guoqiang Wu; Xinyue Deng; Rong Cui

doi:10.3390/molecules28093737

Recovery of Li and Co in Waste Lithium Cobalt Oxide-Based Battery Using H_1.6Mn_1.6O₄

Molecules. 2023 Apr 26;28(9):3737. doi: 10.3390/molecules28093737.

Authors

Hua Wang^{1

2}, Guangzhou Chen^{1

2

3}, Lijie Mo^{1

2}, Guoqiang Wu^{1

2}, Xinyue Deng^{1

2}, Rong Cui⁴

Affiliations

¹ Anhui Key Laboratory of Water Pollution Control and Waste Water Recycling, Anhui Jianzhu University, Hefei 230601, China.
² Anhui Key Laboratory of Environmental Pollution Control and Waste Resource Utilization, Anhui Jianzhu University, Hefei 230601, China.
³ Anhui Research Academy of Ecological Civilization, Anhui Jianzhu University, Hefei 230601, China.
⁴ School of Environment and Energy Engineering, Anhui Jianzhu University, Hefei 230601, China.

Abstract

H_1.6Mn_1.6O₄ lithium-ion screen adsorbents were synthesized by soft chemical synthesis and solid phase calcination and then applied to the recovery of metal Li and Co from waste cathode materials of a lithium cobalt oxide-based battery. The leaching experiments of cobalt and lithium from cathode materials by a citrate hydrogen peroxide system and tartaric acid system were investigated. The experimental results showed that under the citrate hydrogen peroxide system, when the temperature was 90 °C, the rotation speed was 600 r·min^-1 and the solid-liquid ratio was 10 g·1 L^-1, the leaching rate of Co and Li could reach 86.21% and 96.9%, respectively. Under the tartaric acid system, the leaching rates of Co and Li were 90.34% and 92.47%, respectively, under the previous operating conditions. The adsorption results of the lithium-ion screen showed that the adsorbents were highly selective for Li⁺, and the maximum adsorption capacities were 38.05 mg·g^-1. In the process of lithium removal, the dissolution rate of lithium was about 91%, and the results of multiple cycles showed that the stability of the adsorbent was high. The recovery results showed that the purity of LiCl, Li₂CO₃ and CoCl₂ crystals could reach 93%, 99.59% and 87.9%, respectively. LiCoO₂ was regenerated by the sol-gel method. XRD results showed that the regenerated LiCoO₂ had the advantages of higher crystallinity and less impurity.

Keywords: H1.6Mn1.6O4; citric acid; regenerated lithium cobaltate; tartaric acid; waste lithium cobalt oxide based battery.

Abstract

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