Hydrogen Storage Alloy

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The invention provides a hydrogen storage alloy, and in particular, the hydrogen storage alloy according to the invention has a narrow hysteresis and a maximum hydrogen concentration, (H/Lm (NixAlyMoz)), equal to 7. The hydrogen storage alloy, according to the invention, is an ABw type alloy and represented by the general formula : Lm(NixAlyMoz), and where 4.7≰w≰5.3, Lm is a La-rich misch metal and comprises La, Ce, Pr, and Nd., w=x+y+z, x, y and z are a mole number, respectively.