Nineteen different designs of nickel electrodes were tested in Ni/H2 boiler plate cells in an accelerated low earth orbit cycle regime to the end of their life. The failure analyses of these cells showed that the major performance changes due to the cycling wasa severe reduction of their high rate discharge capability rather than an absolute capacity reduction. Many physical changes of the nickel electrodes were observed after the cycling test. These changes include dimensional expansion, sinter rupture, loose black powdering of the active material, morphology changes, active material migration, increase of pore volume, change of pore distribution, and increase of surface area. All of these were caused by active material expansion with cycling. Among these changes, the morphology change which involves migration of active material away from the current collecting nickel sinter appears to be that most responsible for the reduction of the rate capability.


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    Titel :

    Long life nickel electrodes for a nickel-hydrogen cell: 3. Results of an accelerated test and failure analysis


    Weitere Titelangaben:

    Langlebige Nickelelektroden fuer eine Nickel-Wasserstoff-Zelle: III. Ergebnisse eines beschleunigten Tests und Ausfallanalysen


    Beteiligte:
    Lim, H.S. (Autor:in) / Verzwyvelt, S.A. (Autor:in)


    Erscheinungsdatum :

    1984


    Format / Umfang :

    7 Seiten, 18 Bilder, 1 Tabelle, 5 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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    Nickel-hydrogen cell life test

    Wheeler, J.R. / Coates, D.K. | Tema Archiv | 1985



    Cycle life of nickel-hydrogen cells. II. accelerated cycle life test

    Lim, H.S. / Verzwyvelt, S.A. | Tema Archiv | 1986