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Hydrometallurgical approach for lithium concentration from end-of-life LiFePO4 automotive batteries
Abstract Recycling LFP-type lithium-ion batteries is essential for recovering valuable metals such as lithium. The efficient extraction of this material contributes not only to the conservation of limited natural resources, but also to reducing dependence on mining. In addition, proper recycling minimizes the risks of releasing toxic substances into the environment, promoting more sustainable practices in the automotive industry. Exploring advanced recycling technologies is crucial to optimizing the process and increasing efficiency in material recovery. Methods such as pyrometallurgy and hydrometallurgy have the potential to obtain high yields in the recovery of precious metals, contributing to the economic viability of recycling automotive batteries. In this study, the effect of a hydrometallurgical process on the recovery of lithium salts from spent LiFePO4 batteries was studied, using an aqueous solution of nitric acid as the medium. Around 99.23% of Fe and 84.18% of Li were recovered as FeOH and Li3PO4. According to the proposed mechanism, the LiFePO4 cathode powder was more easily destroyed and transformed into disordered states at concentrations with a 10% stoichiometric excess, leading to a significant increase in leaching and efficiency in lithium concentration.
Hydrometallurgical approach for lithium concentration from end-of-life LiFePO4 automotive batteries
Abstract Recycling LFP-type lithium-ion batteries is essential for recovering valuable metals such as lithium. The efficient extraction of this material contributes not only to the conservation of limited natural resources, but also to reducing dependence on mining. In addition, proper recycling minimizes the risks of releasing toxic substances into the environment, promoting more sustainable practices in the automotive industry. Exploring advanced recycling technologies is crucial to optimizing the process and increasing efficiency in material recovery. Methods such as pyrometallurgy and hydrometallurgy have the potential to obtain high yields in the recovery of precious metals, contributing to the economic viability of recycling automotive batteries. In this study, the effect of a hydrometallurgical process on the recovery of lithium salts from spent LiFePO4 batteries was studied, using an aqueous solution of nitric acid as the medium. Around 99.23% of Fe and 84.18% of Li were recovered as FeOH and Li3PO4. According to the proposed mechanism, the LiFePO4 cathode powder was more easily destroyed and transformed into disordered states at concentrations with a 10% stoichiometric excess, leading to a significant increase in leaching and efficiency in lithium concentration.
Hydrometallurgical approach for lithium concentration from end-of-life LiFePO4 automotive batteries
Paula Karina Lacava (author) / Júlia Bitencourt Welter (author) / Felipe Antônio Lucca Sánchez (author) / Maria Eduarda Sassi Endres (author) / Hugo Marcelo Veit (author)
2025
Article (Journal)
Electronic Resource
Unknown
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