TiCr_1.2(V–Fe)_0.6—a novel hydrogen storage alloy with high capacity

Abstract

To develop a new alloy with high hydrogen storage capacity, partial Cr in TiCr1.8 was substituted by V—Fe alloy. X-ray diffraction and metallography observation proved that the substitution did not change the phase constitution of TiCr1.2(V–F)0.6. It still remained in its initial Laves phase related body centred cubic structure. Pressure–composition—temperature tests showed that the hydrogen storage capacity could reach up to 3.2 wt% and its reversible capacity to about 2.0 wt%. TG-DSC tests showed that there are two kinds of tetrahedral site for hydrogen atoms to locate.