0 or atomic percentages are used for representing the contents of the hydrogen storage alloy wherein the zr content falls within the range from 7 5 to 37 5 and the remaining contents fall within the range from 12 5 to 18 5 and crystal structure hydrogen absorption kinetics and hydrogen absorption desorption capacity are tested and the designations b1 to b9 represent the mole ratios 0 4 0 7 1 0 1 3 1 7 2 0 2 3 2 6 and 3 0 of zirconium in the hydrogen storage alloy respectively in the x ray diffraction patterns as shown in fig5 a 5 b we can observe that the lattice increases with the zirconium content and thus the 110 peak shifts to the right and thus both titanium and zirconium have a significant effect to the lattice parameters of the lattice in fig6 if the zirconium content of the hydrogen storage alloy is increased the hydrogen absorption capacity of the hydrogen storage alloy will be enhanced and a drop of temperature of the environment of the reaction drops the hydrogen absorption capacity of the hydrogen storage alloy will be enhanced too in addition the pci analysis shows that the volume of lattice will expand 23 83 as shown in table 2 if the zirconium content of the hydrogen storage.