Hydrogen storage properties of the TiVFeZr multicomponent alloy with C14-type laves phase structure

In this work, the structure and hydrogen storage properties of the TiVFeZr multicomponent alloy with C14-type Laves phase structure was comprehensively investigated. This alloy presents fast hydrogen storage kinetics at room temperature with high hydrogen storage capacity, absorbing H/M = 1.5 (2.41 wt%) in less than 100 s under initial hydrogen pressure of 20 bar. This is one of the highest hydrogen storage capacities among the Laves phase alloys reported to date. The formed hydride is highly stable, which needs temperatures above to 550 °C to completely desorb hydrogen. The high hydrogen storage capacity of this alloy as well as the high stability of the formed hydride are discussed in terms of the high fraction of hydride forming elements in the C14-type Laves phase structure.