| 摘要 |
PROBLEM TO BE SOLVED: To provide an alkaline storage battery in which an opposing area of an electrode plate is increased while preventing short circuit between a positive and a negative electrodes, in which realization of thinning and low density of a separator are possible, and which is superior in high output and self-discharge characteristics. SOLUTION: The alkaline storage battery is provided with the negative electrode 11 in which a hydrogen storing alloy of which the general formula is expressed by Ln<SB>1-x</SB>Mg<SB>x</SB>(Ni<SB>1-y</SB>T<SB>y</SB>)<SB>z</SB>(in the formula, Ln is at least one element selected from lanthanide element, Ca, Sr, Sc, Y, Yb, Er, Ti, Zr, and Hf, T is at least one element selected from V, Nb, Ta, Cr, Mo, Mn, Fe, Co, Al, Ga, Zn, Sn, In, Cu, Si, P, and B, 0<x≤1, 0≤y≤0.5, and 2.5≤z≤4.5) is a negative electrode active material, the positive electrode 12, the separator 13, and an alkaline electrolytic solution in a sheath can 15. In the case the surface area of the negative electrode 11 is made to be A (m<SP>2</SP>), a battery volume is made to be S (m<SP>3</SP>), and the weight of the separator 13 is made to be B (g), it is specified that A/S≥1.59×10<SP>3</SP>/m, B/A≤73 g/m<SP>2</SP>, and preferably A/S≥2.09×10<SP>3</SP>/m and B/A≤58 g/m<SP>2</SP>. COPYRIGHT: (C)2006,JPO&NCIPI
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