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Hydrogen storage properties of V30–Ti–Cr–Fe alloys

Authors
Journal
Journal of Alloys and Compounds
0925-8388
Publisher
Elsevier
Publication Date
Volume
427
Identifiers
DOI: 10.1016/j.jallcom.2006.02.056
Keywords
  • Hydrogen Storage Materials
  • V-Based Solid Solution
  • Bcc Alloy
  • Hydrogen Storage Properties

Abstract

Abstract The hydrogen storage properties of V–Ti–Cr–Fe alloys with the compositions of V(30 at.%)–Ti(15–55 at.%)–Cr(7–43 at.%)–Fe(2–18 at.%) were studied in this paper. It was found that the hydrogen absorption capacities and the efficient hydrogen capacities of the alloys are dependent on the Ti/(Cr + Fe) ratio. The largest efficient hydrogen capacity is obtained at a Ti/(Cr + Fe) ratio of 1.0. When Ti/(Cr + Fe) ratio increases from 0.9 to 1.05, the lattice parameters of the alloys and the enthalpy of the hydrides grow, while the hydrogen desorption plateau pressure declines. The alloy of V30Ti35Cr25Fe10, which contains a high Fe content and a low V/Fe ratio of 3:1, exhibits a hydrogen capacity of 3.6 wt.% and an efficient hydrogen capacity of 2.0 wt.% at 298 K.

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