Selective Recovery of Lithium Sulfate from Spent LFP(LiFePO4) Powder

Selective Recovery of Lithium Sulfate from Spent LFP(LiFePO4) Powder

© 2021 by IJETT Journal
Volume-69 Issue-11
Year of Publication : 2021
Authors : Dae-Keun Kang, Min-Yong Shin, Do-Hee Kim, Jei-Pil Wang
DOI :  10.14445/22315381/IJETT-V69I11P215

How to Cite?

Dae-Keun Kang, Min-Yong Shin, Do-Hee Kim, Jei-Pil Wang, "Selective Recovery of Lithium Sulfate from Spent LFP(LiFePO4) Powder," International Journal of Engineering Trends and Technology, vol. 69, no. 11, pp. 122-127, 2021. Crossref,

This study was conducted to selectively leach and recover lithium from spent LFP (LiFePO4), an active cathode material of lithium-ion batteries, using a sulfuric acid solution. The lithium recovery rate according to conditions such as the solid-liquid ratio of sulfuric acid solution and LFP powder, the stirring time, and M concentration in sulfuric acid was investigated. Lithium was selectively recovered under each experimental condition, and the following optimal process conditions were derived as a result of the experiment. Under the following experimental conditions: the sulfuric acid solution concentration of 2M H2SO4, the stirring time of 60 min, and the weight ratio of 1:5, lithium sulfate excluding impurities was selectively recovered, and the Li content in lithium sulfate solution of 403.19 mg, and the Li recovery rate of 99.79% were achieved.

LFP (LiFePO4), active cathode material, sulfuric acid, lithium sulfate

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