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Refractory High-Entropy Alloys for Solid-State Hydrogen Storage

Faye Greaves, Stefano Deledda

2026frhydrogenalloysstoragematerial science

Abstract

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Hydrogen is a clean energy carrier that solely produces water when used as fuel, making it appealing to use for future decarbonisation. However, safe and efficient storage is a major challenge. High-entropy alloys (HEAs) are promising hydrogen storage materials because their multi-element compositions provide tunable properties. The aim of this thesis was to investigate HEAs for high-capacity hydrogen storage. The chosen alloys contain refractory elements (Ti, V, Cr, Zr, Nb, Hf, Ta) and Al as a lightweight metal to increase the gravimetric capacity, improve thermodynamic and cycling performances of these materials. Using advanced techniques in both laboratory and large-scale facilities, this PhD work highlighted that finely tuning the compositions of HEAs can significantly enhance hydrogen uptake and release, presenting an effective pathway for developing reliable hydrogen storage solutions. The results indicate that certain formulations of the alloys exhibit maximum capacities for hydrogen storage under varying conditions, suggesting pathways for future research and application in sustainable energy systems.

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Cite This Work

@article{7255459b-46df-42a7-803f-e8c46b9b0c0d,
  title={Refractory High-Entropy Alloys for Solid-State Hydrogen Storage},
  author={Faye Greaves and Stefano Deledda},
  year={2026},
  language={fr}
}
TY  - JOUR
TI  - Refractory High-Entropy Alloys for Solid-State Hydrogen Storage
AU  - Faye Greaves
AU  - Stefano Deledda
PY  - 2026
LA  - fr
ER  -

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