Design and synthesis of a magnesium alloy for room temperature hydrogen storage
(2018) Acta Materialia — Vol. 149, n° 1, p. 88-96 (2018)
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- Authors
Ikeda, Yuji 
- Abstract
- Safe and high-density storage of hydrogen is a key issue for development of hydrogen as a clean energy carrier. Hydride-forming materials are potential candidates for safe and high-density storage of hydrogen and among them; Mg-based alloys are the most investigated ones due to their high gravimetric capacity. The key issue for practical application of Mg-based alloys is that they do not desorb hydrogen without heating due to the strong hydrogen binding energy. In this study, we employed first-principles calculations to design a Mg-based alloy with a low hydrogen binding energy and room temperature hydrogen storage properties. The designated material, highly-homogenous Mg4NiPd with a BCC-based CsCl-type structure, was successfully synthesized by severe plastic deformation via the high-pressure torsion (HPT) method. The alloy exhibited reversible hydrogenation and dehydrogenation at room temperature with high phase stability. This discovery introduces a rational approach to design and synthesize new alloys for hydrogen storage using the concept of binding energy engineering.
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Citations
Edalati, K., Uehiro, R., Ikeda, Y., Li, H.-W., Emami, H., Filinchuk, Y., Arita, M., Sauvage, X., Tanaka, I., Akiba, E., & Horita, Z. (2018). Design and synthesis of a magnesium alloy for room temperature hydrogen storage. Acta Materialia, 149(1), 88-96. https://doi.org/10.1016/j.actamat.2018.02.033 (Original work published 2018)