发明名称 |
HYDROGEN ABSORBING ALLOY FOR ALKALINE STORAGE BATTERY AND METHOD FOR PREPARING THE SAME |
摘要 |
<p>A hydrogen storage alloy, for use in alkaline storage batteries, having a CaCu5-type crystal structure and represented by the compositional formula MmNixCoyMnzM1-z (wherein M represents at least one element selected from the group consisting of aluminum (Al) and copper (Cu); x is a nickel (Ni) stoichiometry and satisfies 3.0≤x≤5.2; y is a cobalt (Co) stoichiometry and satisfies 0≤y≤1.2; z is a manganese (Mn) stoichiometry and satisfies 0.1≤z≤0.9; and the sum of x, y and z satisfies 4.4≤x+y+z≤5.4). The hydrogen storage alloy includes a bulk region having a CaCu5-type crystal structure and a substantially uniform composition and a surface region surrounding said bulk region and having a graded composition. When the sum in percentage of numbers of cobalt (Co) atoms and copper (Cu) atoms present in the surface region is given by a and that in the bulk region by b, the relationship a/b≥1.3 is satisfied. <IMAGE></p> |
申请公布号 |
EP1100132(A1) |
申请公布日期 |
2001.05.16 |
申请号 |
EP19990957667 |
申请日期 |
1999.06.25 |
申请人 |
SANYO ELECTRIC CO., LTD. |
发明人 |
IMOTO, TERUHIKO;OUCHI, MASUTAKA;HIROTA, YOHEI;KATO, KIKUKO;HIGASHIYAMA, NOBUYUKI;KIMOTO, MAMORU;FUJITANI, SHIN;NISHIO, KOJI |
分类号 |
B22F1/00;C01B3/00;H01M4/24;H01M4/26;H01M4/36;H01M4/38;H01M4/58;H01M10/34;(IPC1-7):H01M4/38 |
主分类号 |
B22F1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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