How 10 at% Al Addition in the Ti-V-Zr-Nb High-Entropy Alloy Changes Hydrogen Sorption Properties - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Molecules Année : 2021

How 10 at% Al Addition in the Ti-V-Zr-Nb High-Entropy Alloy Changes Hydrogen Sorption Properties

Jorge Montero
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Gustav Ek
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  • PersonId : 1097131
Vivian Nassif
Martin Sahlberg
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  • PersonId : 1097132

Résumé

Al0.10Ti0.30V0.25Zr0.10Nb0.25 was prepared to evaluate the effect of 10% aluminum into the previously reported quaternary alloy, Ti0.325V0.275Zr0.125Nb0.275. The as-cast quinary alloy formed a single-phase body centered cubic solid solution and transformed into a body centered tetragonal after hydrogenation. The alloy had a storage capacity of 1.6 H/M (2.6 wt.%) with fast absorption kinetics at room temperature, reaching full capacity within the first 10 min. The major improvements of Al addition (10%) were related to the desorption and cycling properties of the material. The temperature for hydrogen release was significantly decreased by around 100 °C, and the quinary alloy showed superior cycling stability and higher reversible storage capacity than its quaternary counterpart, 94% and 85% of their respective initial capacity, after 20 hydrogenation cycles without phase decomposition.
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Dates et versions

hal-03210650 , version 1 (28-04-2021)

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Jorge Montero, Gustav Ek, Laetitia Laversenne, Vivian Nassif, Martin Sahlberg, et al.. How 10 at% Al Addition in the Ti-V-Zr-Nb High-Entropy Alloy Changes Hydrogen Sorption Properties. Molecules, 2021, 26 (9), pp.2470. ⟨10.3390/molecules26092470⟩. ⟨hal-03210650⟩
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