HYDROGEN-ABSORBING RARE GROUND CONNECTION METAL/CNICKEL ALLOY, MANUFACTURING PROCESS AND NEGATIVES

A rare earth metal-nickel hydrogen storage alloy of a composition represented by the formula : RNiaMnbCocAldXe (R stands for one or more rare earth elements including Sc and Y, not less than 95 atom % of which is one or more elements selected from the group consisting of La, Ce, Pr, and Nd; X stands for one or more elements selected from the group consisting of Fe, Cu, Zn, V, and Nb; a, b, c, d, and e satisfy the relations of 3.9