The importance of hydrogen in economic development can be attributed to its great potential as a clean and renewable energy source. The structural versatility of metal hydrides has proven to be instrumental in the design of hydrogen storage components. Despite its low volumetric energy density and light in nature, its storage remains challenging due to its high susceptibility to evaporation. However, hydrogen desorption-absorption from a convectional metal hydride can be challenging to gravimetric storage. The lack of effective materials with the potential of reversibility and heat transfer also contribute to these issues. Therefore, researchers continue to explore strategies to mitigate the drawbacks associated with metal hydrides by developing advanced materials such as high-entropy alloys (HEAs) with improved reaction kinetics and finding ways to enhance their practical utility for various applications. HEAs have unique compositional flexibility and diffusion properties, making them efficient for hydrogen storage without high pressure and extremely low-temperature requirements. In this review, we focused on the design and synthesis strategies of HEA alloys, the thermodynamics of HEA for hydrogen storage, the thermal analysis of hydrogenation in HEAs, and the embrittlement of structural alloys in the presence of hydrogen. The review indicated that HEAs have the potential to improve the properties of solid-state storage materials significantly. Their efficiency and compatibility with fuel cells make them a promising candidate for the future of sustainable energy.
Citation: Adebayo Olutumbi Ogunyinka, Abimbola Patricia Idowu Popoola, Sisa Lesley Pityana, Emmanuel Rotimi Sadiku, Olawale Mohammed Popoola, Modupeola Oluwaseun Dada. Potential of high entropy alloys in hydrogen storage technologies[J]. AIMS Energy, 2025, 13(6): 1463-1517. doi: 10.3934/energy.2025055
The importance of hydrogen in economic development can be attributed to its great potential as a clean and renewable energy source. The structural versatility of metal hydrides has proven to be instrumental in the design of hydrogen storage components. Despite its low volumetric energy density and light in nature, its storage remains challenging due to its high susceptibility to evaporation. However, hydrogen desorption-absorption from a convectional metal hydride can be challenging to gravimetric storage. The lack of effective materials with the potential of reversibility and heat transfer also contribute to these issues. Therefore, researchers continue to explore strategies to mitigate the drawbacks associated with metal hydrides by developing advanced materials such as high-entropy alloys (HEAs) with improved reaction kinetics and finding ways to enhance their practical utility for various applications. HEAs have unique compositional flexibility and diffusion properties, making them efficient for hydrogen storage without high pressure and extremely low-temperature requirements. In this review, we focused on the design and synthesis strategies of HEA alloys, the thermodynamics of HEA for hydrogen storage, the thermal analysis of hydrogenation in HEAs, and the embrittlement of structural alloys in the presence of hydrogen. The review indicated that HEAs have the potential to improve the properties of solid-state storage materials significantly. Their efficiency and compatibility with fuel cells make them a promising candidate for the future of sustainable energy.
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Figures(13) / Tables(9)
Adebayo Olutumbi Ogunyinka, Abimbola Patricia Idowu Popoola, Sisa Lesley Pityana, Emmanuel Rotimi Sadiku, Olawale Mohammed Popoola, Modupeola Oluwaseun Dada. Potential of high entropy alloys in hydrogen storage technologies[J]. AIMS Energy, 2025, 13(6): 1463-1517. doi: 10.3934/energy.2025055
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