Effects on the positive electrode of the corrosion of AB{sub 5} alloys in nickel-metal-hydride batteries

Journal Article · Sun Feb 01 00:00:00 EST 1998 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/1.1838284· OSTI ID:599896

Bernard, P ^[1]

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1. SAFT, Marcoussis (France). Research Dept.

Effects of corrosion of MmNi{sub 4.3{minus}x}Mn{sub 0.3}Al{sub 0.4}Co{sub x} alloys (where Mm = Ce 50%, La 30%, Nd 15%, Pr 5%) are evaluated in nickel-metal-hydride (Ni-MH) cells. Particularly, it is shown how Al released by the corroded alloys pollutes the positive electrode, which endures a loss of charging efficiency, due to the formation of a hydrotalcite-like phase stabilized with Al. Furthermore, since Al is eluted from the hydride electrode and is completely trapped in the positive active material, the titration of this element in the positive electrode is a powerful technique for quantification of the corrosion of AB{sub 5} alloys in Ni-MH cells.

• Sponsoring Organization: USDOE
• OSTI ID: 599896
• Journal Information: Journal of the Electrochemical Society, Vol. 145, Issue 2; Other Information: PBD: Feb 1998
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
25 ENERGY STORAGE
NICKEL-HYDROGEN BATTERIES
CORROSION PRODUCTS
CATHODES
MANGANESE ALLOYS
ALUMINIUM ALLOYS
COBALT ALLOYS
NICKEL ALLOYS
CERIUM ALLOYS
LANTHANUM ALLOYS
NEODYMIUM ALLOYS
PRASEODYMIUM ALLOYS
ELECTRIC-POWERED VEHICLES