| 简介 |
PROBLEM TO BE SOLVED : To provide a hydrogen occlusion alloy electrode and a nickel hydrogen storage battery which is not inferior to discharge capacity and excellent in durability represented by the charging-discharging cyclic characteristic compared with conventional ones. SOLUTION : In the composition of hydrogen occlusion alloy powder, R1 denotes at least one element out of lanthanoids with atomic number 59-62, R2 denotes at least one element out of lanthanoids with the atomic number being Y and ≥ 63, and X denotes at least one kind of metal elements not belonging to rare earth elements. When the composition formula is expressed by LaaCebR1cR2dNieCofSg, the following conditions are satisfied : a+b+c+d=1.0, 0.6 ≤ a ≤ 0.9, 0.05 ≤ b, 0 ≤ c, 0COPYRIGHT : (C)2004, JPO |
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