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Magnesium-Based Materials for Hydrogen Storage-A Scope Review.

Agata Baran¹, Marek Polański¹

¹Department of Functional Materials and Hydrogen Technology, Military University of Technology, Kaliskiego 2 Street, 00-908 Warsaw, Poland.

Materials (Basel, Switzerland)

|September 12, 2020

Summary

This review covers magnesium hydride and related ternary hydrides, exploring synthesis, modification, and properties for hydrogen storage. Practical applications remain challenging despite theoretical interest.

Keywords:

Mg2CoH5 Mg2FeH6 Mg2NiH4 ball milling hydrogen storage magnesium hydride magnesium ternary hydrides magnesium-based hydrides mechanical alloying mechanochemical synthesis reactive ball milling solid-state hydrogen storage

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Area of Science:

Materials Science
Chemistry
Nanotechnology

Background:

Magnesium hydrides and ternary magnesium-based hydrides (Mg2FeH6, Mg2NiH4, Mg2CoH5) are investigated for hydrogen storage.
Current research focuses on synthesis and modification methods to enhance material properties.

Purpose of the Study:

To review synthesis and modification techniques for magnesium-based hydrides.
To analyze the impact of additives, nanostructurization, and other factors on hydride properties.
To assess the potential and limitations of these materials for practical hydrogen storage.

Main Methods:

Review of existing literature on magnesium hydride synthesis and modification.
Analysis of the effects of mechanical synthesis (milling) and additives (oxides, halides, intermetallics).
Examination of nanostructurization, polymorphic transformations, and cyclic stability.

Main Results:

Various modification strategies, including mechanical milling and additive incorporation, are discussed.
The influence of factors like nanostructurization and additives on hydrogen storage capacity and kinetics is described.
Despite extensive research, many factors influencing performance and stability remain unclear.

Conclusions:

Magnesium-based hydrides offer theoretical promise for hydrogen storage.
Practical application of these hydrides is still debatable due to unresolved challenges in performance and stability.
Further research is needed to fully understand and overcome limitations for real-world use.