IJBTT

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, https://doi.org/10.14445/22315381/IJETT-V69I11P215

Abstract
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.

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

Reference
[1] Park, H. K., The Research and Development Trend of Cathode Materials in Lithium-Ion Batteries, Journal of the Korean Electrochemical Society, 11(3) (2008) 197-210.
[2] Manthiram, A., Goodenough, J., Lithium insertion into Fe2(MO4)3 frameworks: Comparison of M = W with M = Mo, Journal of Solid State Chemistry, 71(2) (1987) 349?360.
[3] Nadiri, A., Delmas, C., Salmon, R., et al.), Chemical and electrochemical alkali metal intercalation in the 3D-framework of Fe2(MoO4)3, Revue de chimie mine?rale, 21(4) (1884) 537?544.
[4] Xu, Z., Gao, L., Liu, Y., et al.), Review - Recent Developments in the Doped LiFePO4 Cathode Materials for Power Lithium-Ion Batteries, Journal of The Electrochemical Society, 163(13) (2016) A2600?A2610.
[5] Goodenough, J. B., Kim, Y., Challenges for Rechargeable Li Batteries, Chemistry of Materials, 22(3) (2010) 587?603.
[6] Bian, D., Sun, Y., Li, S., et al.), A novel process to recycle spent LiFePO4 for synthesizing LiFePO4/C hierarchical micro flowers, Electrochimica. Acta, 190 (2016) 134?140.
[7] Wang, S., Yang, H., Feng, L., et al.), A simple and inexpensive synthesis route for LiFePO4/C nanoparticles by co-precipitation, Journal of Power Sources, 233 (2013) 43?46.
[8] Hwang, Y. S., Lee, M. J., Cho, M. J., Towards a Recycling ‘Double Green’ Society, (2020) 30 , 1st Edition.
[9] Zeng, X., Li, J., Singh, N., Recycling of Spent Lithium-Ion Battery: A Critical Review, Critical Reviews in Environmental Science and Technology, 44(10) (2014) 1129?1165.
[10] Kuang, G., Li, H., Hu, S., et al.), Recovery of aluminum and lithium from gypsum residue obtained in the process of lithium extraction from Lepidolite, Hydrometallurgy, 157 214?218.
[11] Moon J. H., Cobalt recovery from spent lithium-ion battery and recycling of active cathode material. Master, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, Korea, 03722. (2013).
[12] Zheng, R., Zhao, L., Wang, W., et al.), Optimized Li and Fe recovery from spent lithium-ion batteries via solution-precipitation method, RSC Advances, 6(49) 43613? 43625.
[13] Shin, E. J., Kim, S., Noh, J.-K., et al.), A Green Recycling Process Designed for LiFePO4 Cathode Materials for Li-ion Batteries, Journal of Materials Chemistry A, 3(21) (2015) 11493?11502.
[14] Cai, G., Fung, K. Y., Ng, K. M., et al.), Process Development for the Recycle of Spent Lithium-Ion Batteries by Chemical Precipitation, Industrial & Engineering Chemistry Research, 3(47) (2014) 18245?18259.
[15] Chen, J., Li, Q., Song, J., et al.), Environmentally friendly recycling and effective repairing of cathode powders from spent LiFePO4 batteries, Green Chemistry, 18(8) (2016) 2500?2506.
[16] Song, X., Hu, T., Liang, C., et al.), Direct regeneration of cathode materials from spent lithium iron phosphate batteries using a solid phase sintering method, RSC Advances, 7(8) (2017) 4783?4790.
[17] Kim, H. S., Shin, E. J., Re-synthesis and Electrochemical Characteristics of LiFePO4 Cathode Materials Recycled from Scrap Electrodes, Bulletin of the Korean Chemical Society, 34(3) (2013) 851?855.