| 简介 |
PROBLEM TO BE SOLVED : To provide an alkaline storage battery whose volume is increased using a rare earth-Mg-Ni-based hydrogen storage alloy as a negative electrode, in which discharge properties under the extra-low temperature conditions of -20°C are improved while maintaining its cycle life properties by modifying the surface of the hydrogen storage alloy used for the negative electrode.SOLUTION : In the hydrogen storage alloy expressed by general formula Ln1-xMgxNiyAz (wherein, Ln is at least one element selected from rare earth elements including Y, Ca, Zr and Ti; A is an element(s) selected from Co, Mn, V, Cr, Nb, Al, Ga, Zn, Sn, Cu, Si, P and B; and the conditions of 0.05≤x≤0.25, 0
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