Uncovering the Effect of Al Addition on the Hydrogen Storage Properties of the Ternary TiVNb Alloy.

ABSTRACT: The effect of Al addition on the structure, microstructure and hydrogen storage properties of the ternary TiVNb alloy was investigated from small amounts to equimolar composition. Al_x(TiVNb)_1-x (x = 0.05, 0.175 and 0.25) alloys are bcc single-phase materials with decreasing lattice parameters with increasing Al content. Al addition progressively decreases the hydrogen storage capacity but also destabilizes fcc dihydride formation for alloys with x ≤ 0.10. Among the different compositions, the most promising alloy was found to be that with x = 0.05 Al content that exhibited high initial storage capacity (2.96 wt.%), a less stable hydride (ΔH = -52 kJ/mol H₂ and ΔS = -141 J/K∙mol H₂), better desorption properties (desorption onset tem

SUBMITTER: Pineda-Romero N 

PROVIDER: S-EPMC9698924 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature