Patent ID: 6248475
Filing Date: 2001-06-19
Classification: H01M,Y02E,Y10S

Abstract:
A nickel-hydrogen secondary battery which comprises a negative electrode comprising a hydrogen-absorbing alloy represented by the following general formula (A), a positive electrode, and an alkaline electrolyte, and which meets the following conditions represented by the following formulas (1) and (2);(R.sub.1-x Mg.sub.x)Ni.sub.y A.sub.z (A)wherein R contains at least one element selected from rare earth elements; A is at least one element selected from Co, Mn, Fe, V, Cr, Nb, Al, Ga, Zn, Sn, Cu, Si, P and B; and x,y and z are atomic ratio individually defined as 0<x<1.0.ltoreq.1.5, 2.5.ltoreq.y+z<4.5;3.2.ltoreq.P.ltoreq.5.0 (1)0.9.ltoreq.Q.ltoreq.0.2P+0.7 (2)wherein P is a quantity (g) of said hydrogen-absorbing alloy per theoretical capacity 1 Ah of said positive electrode, Q os a quantity (mL) of said alkaline electrolyte per theoretical capacity 1 Ah of said positive electrode.