Ab2 type-based hydrogen storage alloys, methods of preparation and uses thereof

A hydrogen storage alloy having an AB2 type crystal structure, its A site contains Ti and Zr, and its B site contains Cr, Mn, Fe, Ni and Re elements, represented by the general Formula (I)

• TixZryCraMnbFecNidCueVfReg (I)
• in which x, y, a, b, c and d are molar ratios Re is selected from La and Ce;
• 0.2≤x≤0.95;
• 0.05≤y≤0.45;
• 0.001≤a≤1;
• 0.3≤b≤2;
• 0.01≤c≤0.6;
• 0.005≤d≤1.5;
• 0≤e≤0.1;
• 0≤f≤0.5;
• 0.01≤g≤0.05;
• a+b+c+d+e+f+g=1.9-2.3.