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Experimental Study on Extraction of Lithium from Spent Lithium Iron Phosphate Batteries by Selective Leaching and Preparation of Lithium Phosphate
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Zhan DONG1, 2, 3, Lushuai YAO1, 2, 3, Qianwen LI1, 2, 3, Qing XIONG1, 2, 3, Enhao LI1, 2, 3, Huiyang LIN1, 2, 3, Zishuai LIU1, 2, 3
Mining and Metallurgical Engineering | 2025, 45(6) : 140 - 145
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Mining and Metallurgical Engineering | 2025, 45(6): 140-145
• METALLURGY •
Experimental Study on Extraction of Lithium from Spent Lithium Iron Phosphate Batteries by Selective Leaching and Preparation of Lithium Phosphate
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Zhan DONG1, 2, 3, Lushuai YAO1, 2, 3, Qianwen LI1, 2, 3, Qing XIONG1, 2, 3, Enhao LI1, 2, 3, Huiyang LIN1, 2, 3, Zishuai LIU1, 2, 3
Affiliations
  • 1.Jiangxi Provincial Key Laboratory of Low-Carbon Processing and Utilization of Strategic Metal Mineral Resources, School of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China
  • 2.School of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China
  • 3.Yichun Lithium New Energy Industry Research Institute, Jiangxi University of Science and Technology, Yichun 336000, Jiangxi, China
doi: 10.3969/j.issn.0253-6099.2025.06.025
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Spent lithium iron phosphate batteries were taken in a research on lithium extraction by selective leaching process and preparation of high-purity lithium phosphate. It is shown that by adopting a process consisting of leaching with sulfuric acid and hydrogen peroxide, neutralization for impurity removal, and precipitation with sodium phosphate, the lithium leaching rate can reach 98.07% and the iron leaching rate is just 0.28%, after leaching at room temperature with sulfuric acid at a concentration of 0.3 mol/L, hydrogen peroxide at a dosage of 0.50 mL/g, and liquid-solid ratio of 8 mL/g, showing that separation of lithium and iron can be actualized by selective leaching. Then, after the leachate is neutralized with sodium hydroxide for removing impurities, and subjected to precipitation process at a temperature of 90 ℃ for 60 min, with an initial pH of 10.5, sodium phosphate and lithium in a molar ratio of 1∶1, the lithium precipitation rate reaches 96.64%, and a high-purity lithium phosphate product with a lithium content of 16.16% is prepared. It is concluded that by adopting such process, lithium can be efficiently recovered from spent lithium iron phosphate batteries.

lithium iron phosphate battery  /  spent battery  /  lithium extraction  /  selective leaching  /  chemical precipitation  /  lithium phosphate  /  purification and impurity removal  /  leaching sulfuric acid
董战, 姚鲁帅, 黎倩文, 熊庆, 李恩昊, 林辉阳, 刘子帅. 退役磷酸铁锂电池选择性浸出提锂及制备磷酸锂试验研究. 矿冶工程杂志, 2025 , 45 (6) : 140 -145 . DOI: 10.3969/j.issn.0253-6099.2025.06.025
Zhan DONG, Lushuai YAO, Qianwen LI, Qing XIONG, Enhao LI, Huiyang LIN, Zishuai LIU. Experimental Study on Extraction of Lithium from Spent Lithium Iron Phosphate Batteries by Selective Leaching and Preparation of Lithium Phosphate[J]. Mining and Metallurgical Engineering, 2025 , 45 (6) : 140 -145 . DOI: 10.3969/j.issn.0253-6099.2025.06.025
Appendix
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Year 2025 volume 45 Issue 6
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doi: 10.3969/j.issn.0253-6099.2025.06.025
  • Receive Date：2025-05-30
  • Online Date：2026-10-08
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  • Received：2025-05-30
Funding
Affiliations
    1.Jiangxi Provincial Key Laboratory of Low-Carbon Processing and Utilization of Strategic Metal Mineral Resources, School of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China
    2.School of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China
    3.Yichun Lithium New Energy Industry Research Institute, Jiangxi University of Science and Technology, Yichun 336000, Jiangxi, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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