The AB5-type alloy powder (MINi(3.6)Co(0.7)Mn(0.3)Al(0.4) prepared by melt-spinning was treated by a reducer (solution of sodium hypophosphite) to form a Ni-rich layer on the surface of the particles, which can obviously improved the activity of the quenched powder. For the treated alloy powder the discharge capacity after 2 cycles of charge-discharge reached an ideal value of 241 mA h g-1, but only 222 mA h g-1 for the non-treated alloy powder after 5 cycles of charge-discharge. AES and XPS results show that the nature of the oxide layer formed on the surface plays a key role on the activation process of the metal hydrides in alkaline solution.


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    Titel :

    Effect of sodium hypophosphite on the activation behavior of hydrogen storage alloy


    Weitere Titelangaben:

    Einfluß von Natriumhypophosphit auf das Aktivierungsverhalten von Legierungen zur Wasserstoffspeicherung
    Titel chinesisch


    Beteiligte:
    Hua, J. (Autor:in) / Sun, Y. (Autor:in) / Wang, W. (Autor:in) / Sun, W. (Autor:in) / Cai, Q. (Autor:in) / Hu, Z. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    2001


    Format / Umfang :

    5 Seiten, 6 Bilder, 1 Tabelle, 27 Quellen



    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Unbekannt




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