Research Progress in Magnesium-Based Solid Hydrogen Storage

The materials produced with magnesium for hydrogen storage have the highest potential for growth and have received huge attention because of their low cost, large supply, and excellent hydrogen storage capacity. However, because to its steady hydrogen absorption and emission thermodynamics and slow kinetics, this material's use in hydrogen storage is constrained. Hydrogen uptake and release of materials are thermodynamically stable and slow kinetic, because hydrogen molecules have a high dissociation energy on the surface of Mg, while hydrogen atoms have a slow diffusion rate in the magnesium lattice, which limits its application. Therefore, a large number of research works have focused on the thermal/kinetic modification of magnesium-based materials recently, and has made significant progress. In this paper, the modification methods of the above materials are analyzed, with emphasis on the mechanism of absorption and release of hydrogen, and the influence of alloying, nano crystallization and catalyst addition on optimizing and improving the material properties. Finally, research results are summarized, and the future development direction is discussed.