Recovery of iron phosphate and lithium carbonate from sulfuric acid leaching solutions of spent LiFePO4 batteries by chemical precipitation

• Autorzy: Jing Chen , Tran Thanh Tuan , Lee Man Seung

Identyfikatory

DOI

10.37190/ppmp/189463

• Języki publikacji: EN

Abstrakty

EN

The recycling of lithium and iron from spent lithium iron phosphate (LiFePO4) batteries has gained attention due to the explosive growth of the electric vehicle market. To recover both of these metal ions from the sulfuric acid leaching solution of spent LiFePO4 batteries, a process based on precipitation was proposed in this study. Since ferric and ferrous ions coexisted in the leaching solution, all the ferrous ions were first oxidized to ferric ions by adding H2O2 to the leaching solution. About 99% iron(III) was recovered as iron phosphate by adjusting the solution pH to 2 at 25°C for 30 mins. After the precipitation of iron phosphate, the remaining Li(I) in the filtrate was recovered as lithium carbonate by precipitation with Na2CO3 as a precipitant. Addition of acetone to the filtrate at room temperature greatly enhanced the precipitation percentage of Li(I). Moreover, solid Na2CO3 was better than Na2CO3 solution in precipitating Li(I). About 95% of lithium ions was recovered as carbonate precipitates under the optimum conditions: solution pH = 11, 3.0 molar ratio of solid Na2CO3 to Li(I), 7/5(v/v) volume ratio of acetone to the filtrate, 25°C, 300 rpm for 2 hrs.

Słowa kluczowe

EN

spent LiFePO4 battery; leaching solution; precipitation; lithium; iron

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2024
• Tom: Vol. 60, iss. 3
• Strony: art. no. 189463
• Opis fizyczny: Bibliogr. 32 poz., rys., tab., wykr.

Twórcy

autor

Jing Chen

• Department of Advanced Materials Science & Engineering, Institute of Rare Metal, Mokpo National University, Chonnam 534-729, Korea

autor

Tran Thanh Tuan

• Faculty of Biological, Chemical and Food Technology, Can Tho University of Technology, Can Tho City 900000, Vietnam

autor

Lee Man Seung

• Department of Advanced Materials Science & Engineering, Institute of Rare Metal, Mokpo National University, Chonnam 534-729, Korea

Bibliografia

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