| 简介 |
PROBLEM TO BE SOLVED : To provide an alkaline secondary battery equipped with an anode containing a rare-earth Mg-Ni-based hydrogen storage alloy, suitable for heightened capacity, and with improved cycle characteristics.
SOLUTION : The alkaline secondary battery containing particles (14) of a hydrogen storage alloy in an anode (4), the hydrogen storage alloy contains a component expressed in general formula : M1-βMgβNiγ-δ-εZnδTε. In the formula, M is one or two or more elements selected from a group consisting of La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Ca, Sr, Sc, Y, Ti, Zr, and Hf, and at least expresses an element containing Sm. Subscripts β, γ, δ, ε express numbers satisfying the followings : 0.05≤β≤0.15, 2.8≤γ≤4.0, 0.1≤δ≤1.0, 0≤ε≤0.25.
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