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Production of AB5 materials from spent Ni-MH batteries with further tests of hydrogen storage suitability
Chalmers Univ Technol, Dept Chem & Chem Engn Nucl Chem & Ind Mat Recyclin, S-41296 Gothenburg, Sweden..
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Inorganic Chemistry.ORCID iD: 0000-0002-8690-9957
Chalmers Univ Technol, Dept Chem & Chem Engn Nucl Chem & Ind Mat Recyclin, S-41296 Gothenburg, Sweden..
Chalmers Univ Technol, Dept Chem & Chem Engn, S-41296 Gothenburg, Sweden..
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2022 (English)In: Journal of Power Sources, ISSN 0378-7753, E-ISSN 1873-2755, Vol. 539, article id 231459Article in journal (Refereed) Published
Abstract [en]

A novel approach for the reuse of rare earth (REE) elements generated during hydrometallurgical processing of Ni-MH batteries as alternative sources is provided to valorize Ni-MH batteries wastes. The production of AB5-based alloys from spent Ni-MH waste was thoroughly investigated. The REE elements were recovered as a mixture in oxalate form and annealed at 900 °C to obtain a single-phase REEs oxide REE2O3. Citrate gel and glycine nitrate processes followed by the Ca reduction process under H2 atmosphere were used to produce the AB5 alloys. The alloys were successfully produced, and their crystal structure and morphology have been studied using X-ray diffraction (XRD), scanning electron microscopy (SEM) with supporting energy-dispersive X-ray (EDS) analysis. Nanoparticles with a size of 173±3 nm and 150±8 nm were observed using transmission electron microscopy (TEM) for CG and GNP alloys. Studied samples were subjected to hydrogenation, and the structural changes were depicted.

Place, publisher, year, edition, pages
Elsevier Elsevier, 2022. Vol. 539, article id 231459
Keywords [en]
Spent NiMH batteries, Hydrometallurgy, Rare earth mixture, Citrate gel, Glycine nitrate process, AB5 based alloy, Hydrogenation
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-478634DOI: 10.1016/j.jpowsour.2022.231459ISI: 000808885800002OAI: oai:DiVA.org:uu-478634DiVA, id: diva2:1677697
Funder
Swedish Research Council Formas, 2017-00637Swedish Foundation for Strategic Research, EM16-0039ÅForsk (Ångpanneföreningen's Foundation for Research and Development), 16-406SweGRIDS - Swedish Centre for Smart Grids and Energy StorageSwedish Energy AgencyAvailable from: 2022-06-28 Created: 2022-06-28 Last updated: 2024-01-15Bibliographically approved

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Shtender, VitaliiSahlberg, Martin

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