Extraction Reprocessing of Fe,Ni-Containing Parts of Ni–MH Batteries


A combined method for the reprocessing of Fe,Ni-containing parts of spent Ni–MH batteries has been developed. Leaching and extractive separation of Fe(III) and Ni(II) ions from anode grids of recovered commercially available batteries has been accomplished. The possibility of efficient separation of Fe(III) and Ni(II) ions (βFe/Ni = 22) in aqueous two-phase system based on polypropylene glycol-425 and leaching phase-forming solution based on nickel chloride has been shown for the first time. The obtained results can be used for the extraction reprocessing of Ni–MH batteries.

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This work was supported by the Russian Foundation for Basic Research and Moscow Government (project no. 19-33-70011) using equipment of the Shared Facility Center, Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences.

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Correspondence to A. A. Voshkin.

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Translated by I. Kudryavtsev

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Fedorova, M.I., Zakhodyaeva, Y.A., Baranchikov, A.E. et al. Extraction Reprocessing of Fe,Ni-Containing Parts of Ni–MH Batteries. Russ. J. Inorg. Chem. 66, 266–272 (2021). https://doi.org/10.1134/S003602362102008X

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  • liquid–liquid extraction
  • aqueous two-phase systems
  • spent nickel–metal hydride batteries
  • green chemistry