| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hydrogen storage alloy which can occlude a large amount of hydrogen at a low temperature under a pressure within a practical range and release a large amount of the occluded hydrogen at a low temperature under the atmospheric pressure or above. <P>SOLUTION: The hydrogen storage alloy comprises a Laves phase which has a composition represented by the formula: AB<SB>n</SB>(wherein A is at least either Ti or Zr; B is at least one element chosen from Cr, Fe, Co, Ni, Cu, Nb, Mo, V, Mn, and W; and 1.5<n<2.5) and has a hexagonal C14 crystal structure. Here, parameter S which represents the volume of a unit lattice and is represented by the formula: S=√3×a<SP>2</SP>×c/2(Å<SP>3</SP>) (wherein a and c are a- and c-axis lattice constants (Å), respectively) is within the range: 163<S<174. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
