| 摘要 |
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 </= a < 6.0, 0.45 </= b < 1.5, 0.01 </= c < 0.3, 0.4 </= d </= 1, 0 </= e </= 0.2, and 5.2 </= a+b+c+d+e </= 7.5), the alloy having a matrix of CaCu5 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. <IMAGE> |
