Abstract
Recycling of cathode material of spent lithium-ion batteries (LIBs) is important for recovering critical metals and protecting the environment. This study thus proposes a sustainable recycling process for cathode material (nickel-cobalt-manganese/NCM chemistry) via leaching with an acidic organophosphorus extractant, di-(2-ethylhexyl)phosphoric acid/D2EHPA and copper (current collector) as the reducing agent. The effects of leaching parameters, including stirring speed, Cu amount, D2EHPA concentration, temperature, and time were investigated. The leached metals on the loaded D2EHPA were recovered via stripping using pH-controlled aqueous solutions. Using D2EHPA for leaching allows process intensification because it integrates leaching and solvent extraction (SX) in one-stage operation. It also reduces the consumption of aqueous solutions, thereby minimizing wastewater generation.
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Acknowledgements
This work was supported by the Korea Institute of Energy Technology Evaluation and Planning 538 (KETEP) grant funded by the Korea government (MOTIE) (20217510100080, Development of 539 critical metal recovery technologies (capacity of 200 kg/day) from low-grade solid wastes for the 540 foundation of open access recycling platform).
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© 2024 The Minerals, Metals & Materials Society
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Kurniawan, K., Kim, S., Lee, H., Bae, M., Kim, H., Lee, Jc. (2024). Leaching of Critical Metals from Spent Lithium-Ion Battery Using Acidic Organophosphorus Extractant. In: Forsberg, K., et al. Rare Metal Technology 2024. TMS 2024. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-031-50236-1_14
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DOI: https://doi.org/10.1007/978-3-031-50236-1_14
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