Hydrogen Storage Alloys: State of the Art

A special issue of Metals (ISSN 2075-4701).

Deadline for manuscript submissions: 30 November 2026 | Viewed by 892

Special Issue Editors


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Guest Editor
Centro de Investigación, Innovación y Desarrollo de Materiales CIDEMAT, Facultad de Ingeniería, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín 050010, Colombia
Interests: solid state hydrogen storage materials; light alloys applications; light alloy surface treatment; metallic hydrides; magnesium compound nanoparticles

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Guest Editor
Grupo de Investigación Materiales con Impacto—MAT&MPAC, Facultad de Ingenierías, Universidad de Medellín, Carrera 87 No 30-65, Medellín 050026, Colombia
Interests: magnesium powders; solid-state hydrogen storage; FeTi alloys

Special Issue Information

Dear Colleagues,

The global effects of climate change have instigated the search for new sources of clean energy so an affordable and fair energy transition can be achieved. Hydrogen has emerged as a very feasible solution to this goal; however, one of the biggest challenges in making hydrogen a real solution as a clean energy source is developing a safe, practical and cost-effective method to store it in its gas form. Solid-state storage has been identified as a very promising solution for this and various materials are being studied to comply with the requirements proposed by different energy agencies around the world. Within these materials, several metallic alloys have shown the potential to efficiently store hydrogen, but limitations regarding thermodynamics, kinetics, storage capacity, activation and reversibility of the absorption/desorption process still require much further research; consequently, the scientific community in this field has seen vast global growth in recent decades.

This Special Issue focuses on improvements related to state-of-the-art hydrogen storage alloys. Contributions may include, but are not limited to, the simulation, synthesis, fabrication, structure, properties, performance and technological application of these alloys. Both original research papers and review articles are welcome in this Special Issue.

Prof. Dr. Félix Echeverría
Prof. Dr. Esteban Correa Bedoya
Guest Editors

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Keywords

  • hydrogen storage capacity
  • solid-state hydrogen storage
  • metallic alloys
  • absorption/desorption kinetics
  • absorption/desorption thermodynamics
  • hydrogen storage battery

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Published Papers (1 paper)

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Research

26 pages, 7789 KB  
Article
Mg2(Co1/3Fe1/3Ni1/3) Processed by Ball-Milling/Annealing and High-Pressure Torsion for Hydrogen Storage, a Hydriding/Dehydriding Cycling Stability Testing
by Karina Suárez-Alcántara, Nidia Libia Torres-García, Paula del Carmen Cintron-Núñez, Joaquín Eduardo González-Hernández, Jorge Mauricio Cubero-Sesin, Espiridión Martínez-Aguilar and Rigoberto López-Juárez
Metals 2026, 16(4), 435; https://doi.org/10.3390/met16040435 - 17 Apr 2026
Viewed by 473
Abstract
A mandatory prerequisite for a good hydrogen storage material is long-term stability in hydriding/dehydriding reactions, in a suitable temperature interval (250–350 °C for magnesium intermetallics). A 50-cycle hydriding/dehydriding stability test of two Mg2(Co1/3Fe1/3Ni1/3) materials is [...] Read more.
A mandatory prerequisite for a good hydrogen storage material is long-term stability in hydriding/dehydriding reactions, in a suitable temperature interval (250–350 °C for magnesium intermetallics). A 50-cycle hydriding/dehydriding stability test of two Mg2(Co1/3Fe1/3Ni1/3) materials is presented. Mg2(Co1/3Fe1/3Ni1/3) was processed progressively by ball milling and annealing, followed by high-pressure torsion. A comparison of the effects of the processing on the cycling test is presented. X-ray diffraction, scanning and transmission electron microscopy, and infrared characterization indicate the morphological and structural changes in the materials after production and cycling. The highest hydrogen storage was 3.55 wt.% and 3.25 wt.% for the ball-milled and annealed Mg2(Co1/3Fe1/3Ni1/3) and high-pressure torsion processed Mg2(Co1/3Fe1/3Ni1/3), respectively, at 15 bar and 300 °C. After 50 cycles of hydriding/dehydriding reactions, the hydriding onset temperature is 69 °C and 50 °C for the ball-milled and annealed Mg2(Co1/3Fe1/3Ni1/3) and high-pressure torsion processed Mg2(Co1/3Fe1/3Ni1/3), respectively. Meanwhile, the dehydriding onset temperatures are 257 °C and 223 °C, with hydrogen storage losses of 16% and 7.4% for the ball-milled and annealed Mg2(Co1/3Fe1/3Ni1/3) and the high-pressure torsion processed Mg2(Co1/3Fe1/3Ni1/3), respectively. Overall, the ball-milled and annealed Mg2(Co1/3Fe1/3Ni1/3) material presented better performance. Full article
(This article belongs to the Special Issue Hydrogen Storage Alloys: State of the Art)
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