A rare earth metal-nickel hydrogen storage alloy of a composition represented by the formula: RNi.sub.a Mn.sub.b Co.sub.c Al.sub.d X.sub.e (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.ltoreq.a<6.0, 0.45.ltoreq.b<1.5, 0.01.ltoreq.c<0.3, 0.4.ltoreq.d.ltoreq.1, 0.ltoreq.e.ltoreq.0.2, and 5.2.ltoreq.a+b+c+d+e.ltoreq.7.5), the alloy having a matrix of CaCu.sub.5 structure, and a Mn-rich secondary phase of 0.3 to 5 .mu.m finely dispersed in the matrix at surface ratio of 0.3 to 7%; a method for producing the same; and an anode for a nickel-hydrogen rechargeable battery containing as anode material the hydrogen storage alloy and an electrically conductive material.

Un alliage de stockage d'hydrogène de métal-nickel de terre rare de composition représentée par la formule : RNi.sub.a Mn.sub.b Co.sub.c Al.sub.d X.sub.e (R représente un ou plusieurs éléments de terre rare comprenant Sc et Y, pas moins de 95 l'atome % dont est un ou plusieurs éléments choisis dans le groupe la La, le ce, le P.R., et le ND ; Stands X pour un ou plusieurs éléments choisis dans le groupe du Fe, du Cu, du Zn, du V, et de la NOTA: ; a, b, c, d, et e satisfont les relations de 3.9.ltoreq.a

 
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