Influence of V content on structure and hydrogen desorption performance of TiCrV-based hydrogen storage alloys

The influence of V content on structure and hydrogen desorption performance of TiCr1.8−XVX alloys were investigated by X-ray diffraction (XRD), pressure composition temperature (PCT) and thermogravimetry and differential scanning calorimetry (TG-DSC) tests. XRD tests showed that the crystal cell volume of both the as-cast and hydrogenated alloys increased with increasing V content. At the same time, however, their hydrogen desorption content first increased and then decreased. Hydrogen desorption tests showed that alloy TiCr1.0V0.8 had the highest hydrogen desorption content among all the investigated alloys.