ALLOY POWDER FOR ELECTRODE, NEGATIVE ELECTRODE FOR ALKALI STORAGE BATTERY USING SAME, AND ALKALI STORAGE BATTERY

摘要

Provided is an alloy powder for an electrode, said alloy powder being capable of imparting both an excellent discharge characteristic and a long life characteristic in an alkali storage battery. The alloy powder for an electrode includes a hydrogen absorbing alloy, and the hydrogen absorbing alloy includes element (L), Mg, Ni, Al, and element (Ma). Element (L) is at least one element (excluding Y) selected from the group consisting of a group 3 element and a group 4 element of the periodic table. Element (Ma) is at least two elements selected from the group consisting of Ge, Y, and Sn. The molar ratio (x) of Mg which accounts for the total of element (L) and Mg is 0.008≤x≤0.54, the molar ratio (y) of Ni in relation to the total of element (L) and Mg is 1.6≤y≤4, the molar ratio (α) of Al in relation to the total of element (L) and Mg is 0.008≤α≤0.32, and the molar ratio (&bgr;) of element (Ma) in relation to the total of element (L) and Mg is 0.01≤&bgr;≤0.12.