Efficient Selective Recovery of Lithium from Waste LiFePO4 Cathode Materials using Low Concentration Sulfuric Solution and 2-step Leaching Method 


Vol. 29,  No. 2, pp. 87-94, Jun.  2023
10.7464/ksct.2023.29.2.87


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  Abstract

The recovery of valuable metals from waste lithium-based secondary batteries is very important in terms of efficiently utilizing earth’s limited number of resources. Currently, the cathode material of a LiFePO4 battery, a type of battery which is widely used in automobiles, contains approximately 5% lithium. After use, the lithium in these batteries can be used again as a raw material for new batteries through lithium recycling. In this study, low-concentration sulfuric acid, a commonly used type of inorganic acid, was used to selectively leach the lithium contained in a waste LiFePO4 cathode material powder. In addition, in order to compare and analyze the leaching efficiency and separation efficiency of each component, the optimalleaching conditions were derived by applying a two-step leaching process with pulp density being used as a variable during leaching. When leaching with pulp density as a variable, it was confirmed that at a pulp density of 200 g/L, the separation efficiency was approximately 200 times higher than at other pulp densities because the iron and phosphorus components were hardly leached at this pulp density. Accordingly, the pulp density of 200 g/L was used tooptimize the leaching conditions for the selective leaching and recovery of lithium.

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  Cite this article

[IEEE Style]

김대원 and 김희선, "Efficient Selective Recovery of Lithium from Waste LiFePO4 Cathode Materials using Low Concentration Sulfuric Solution and 2-step Leaching Method," Clean Technology, vol. 29, no. 2, pp. 87-94, 2023. DOI: 10.7464/ksct.2023.29.2.87.

[ACM Style]

김대원 and 김희선. 2023. Efficient Selective Recovery of Lithium from Waste LiFePO4 Cathode Materials using Low Concentration Sulfuric Solution and 2-step Leaching Method. Clean Technology, 29, 2, (2023), 87-94. DOI: 10.7464/ksct.2023.29.2.87.

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pISSN : 1598 - 9712
eISSN : 2288 - 0690

한국연구재단 등재학술지