| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a hydrogen-storage alloy whose cost can be reduced while keeping good storage and discharge characteristics of hydrogen. <P>SOLUTION: The hydrogen-storage alloy has a composition represented by a general composition formula: RE<SB POS="POST">(1-x)</SB>Mg<SB POS="POST">x</SB>Ni<SB POS="POST">y</SB>Al<SB POS="POST">z</SB>(wherein, RE is one or more elements selected from a group composed of La, Ce, etc.; and subscripts of x, y, z, are in the range of 0.05≤x≤0.2, 4.0≤y≤4.4 and 0.1≤z≤0.3, respectively). The storage alloy is characterized in that a phase having CaCu<SB POS="POST">5</SB>type crystal structure is in the range of 40-90 wt.% of the total composition, a phase having Ce<SB POS="POST">5</SB>Co<SB POS="POST">19</SB>type crystal structure is in the range of 5-39 wt.% of the total composition, and a phase having Pr<SB POS="POST">5</SB>Co<SB POS="POST">19</SB>type crystal structure is in the range of 3-20 wt.% of the total composition. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
