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A multi-analytical methodology for the characterization of industrial samples of spent Ni-MH battery powders

Zielinski, Margot and Cassayre, Laurent and Floquet, Pascal and Macouin, Mélina and Destrac, Philippe and Coppey, Nicolas and Foulet, Cédric and Biscans, Béatrice A multi-analytical methodology for the characterization of industrial samples of spent Ni-MH battery powders. (2020) Waste Management, 118. 677-687. ISSN 0956-053X

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Official URL: https://doi.org/10.1016/j.wasman.2020.09.017


A multi-analytical methodology is implemented to characterize several sieving fractions of industrial samples of Black Mass (BM) powders originating from the thermo-mechanical treatment of cylindrical and prismatic-type spent nickel metal-hydride (Ni-MH) batteries. Elemental analyses of 17 elements (including C and O) indicate that the elemental composition of the powders (greater than93 %wt) does not depend on the battery type nor on the sieving fraction. XRD analyses evidence several phases (including Ni, NiO, CeO2 and C) but their quantification is not possible. Beyond these standard characterisations, magnetic susceptibility measurements demonstrate that the amount of metallic nickel versus nickel oxide increases with the sieving fraction, and that powders from prismatic-type batteries contain twice as much metallic nickel than cylindrical ones. Thanks to statistical analysis (based on clustering algorithms) of an electron probe µ-analysis (EPMA) compositional map, the complete methodology allows us to propose a full phase distribution for the BM particles. Three types of particles are identified and quantified. They originate from the partial oxidation of the battery components (anode active mass, anode current collector, cathode active mass and cathode current collector). The whole picture highlights the joint importance of battery ageing mechanisms, thermal deactivation and BM sieving steps on powder composition

Item Type:Article
HAL Id:hal-02960069
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National d'Études Spatiales - CNES (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
French research institutions > Institut de Recherche pour le Développement - IRD (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Société Nouvelle d'Affinage des Métaux - SNAM (FRANCE)
Laboratory name:
Deposited On:16 Oct 2020 13:27

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