| 摘要 |
PROBLEM TO BE SOLVED: To provide a nickel-hydrogen storage battery having high capacity, excelling in a high-rate charge-discharge characteristic and excelling in a storage characteristic by suppressing self-discharge as well. SOLUTION: This nickel-hydrogen storage battery includes a positive electrode 1, a negative electrode 2 using a hydrogen storage alloy; an alkaline electrolyte, and a fibrous separator 3 arranged between the positive electrode and the negative electrode. In the nickel-hydrogen storage battery, the negative electrode is composed by using a hydrogen storage alloy represented by general formula Ln<SB>1-x</SB>Mg<SB>x</SB>Ni<SB>y-a-b</SB>Al<SB>a</SB>M<SB>b</SB>, wherein Ln is at least one kind of element selected from a rare-earth element, Zr and Ti, M is at least one kind of element selected from V, Nb, Ta, Cr, Mo, Mn, Fe, Co, Ga, Zn, Sn, In, Cu, Si, P, B and Zr, and conditions of 0.05≤x<0.30, 2.8≤y≤3.9, 0.10≤a≤0.25 and 0≤b≤0.5 are satisfied; and ion-exchanging fine powder is fixed at least to a part of the separator. COPYRIGHT: (C)2007,JPO&INPIT
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