Hydrogen absorbing alloy for alkaline storage battery
AssigneeSanyo Electric Co., Ltd.
InventorsShigekazu Yasuoka, Jun Ishida, Tetsuyuki Murata, Hiroshi Nakamura
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Abstract
A hydrogen absorbing alloy represented by the formula Ln1−xMgxNiy−aAla (where Ln is at least one element selected from rare earth elements, 0.05≦x<0.20, 2.8≦y≦3.9 and 0.10≦a≦0.25) which is used for an alkaline storage battery.
Claims17
A hydrogen absorbing alloy represented by the formula Ln1−xMgxNiy-a-bAlaMb (where Ln is at least one element selected from rare earth elements, M is at least one element selected from V, Nb, Ta, Cr, Mo, Mn, Fe, Co, Ga, Zn, Sn, In, Cu, Si, P and B, 0.05≦x<0.20, 2.8≦y≦3.9, 0.10≦a≦0.25 and 0≦b), wherein, when said at least one element selected from rare earth elements includes La, a mole ratio of La in said at least one element selected from rare earth elements is not greater than 0.5.
An alkaline storage battery comprising a positive electrode, a negative electrode and an alkaline electrolyte, wherein the negative electrode comprises a hydrogen absorbing alloy represented by the formula Ln1−xMgxNiy−a−bAlaMb (where Ln is at least one element selected from rare earth elements, M is at least one element selected from V, Nb, Ta, Cr, Mo, Mn, Fe, Co, Ga, Zn, Sn, In, Cu, Si, P and B, 0.05≦x<0.20, 2.8≦y≦3.9 0.10≦a≦0.25 and 0≦b), wherein, when said at least one element selected from rare earth elements includes La, a mole ratio of La in said at least one element selected from rare earth elements is not greater than 0.5.
Dependencies are inferred from the claim text.