| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an alkaline storage battery having high discharge characteristics, high cycle characteristics, and high capacity by containing a rare earth-Mg-Ni system hydrogen absorbing alloy having high hydrogen releasing characteristics, high corrosion resistance to an alkaline electrolyte, and high oxidation resistance in a negative electrode. <P>SOLUTION: The alkaline storage battery is equipped with a positive electrode 3, a negative electrode 4, an alkaline electrolyte, and an additive. The composition of the hydrogen absorbing alloy contained in the negative electrode is represented by general formula: ((PrNd)<SB>α</SB>LN<SB>1-α</SB>)<SB>1-β</SB>Mg<SB>β</SB>Ni<SB>γ-δ-ε</SB>Al<SB>δ</SB>T<SB>ε</SB>. In the formula, Ln represents at least one kind selected from the group comprising La, Ce, or the like, T represents at least one kind selected from the group comprising V, Nb, or the like, and subscripts α, β, γ, δ, and ε each represents a number satisfying 0.7<α, 0.05<β<0.15, 3.0≤γ≤4.2, 0.15≤δ≤0.30, 0≤ε≤0.20. The additive is Al(OH)<SB>3</SB>. <P>COPYRIGHT: (C)2007,JPO&INPIT |
