Progress in improving hydrogen storage properties of Mg-based materials

Mg-based solid hydrogen storage materials have advantages such as high hydrogen storage capacity, safety and reliability, low price, and abundant magnesium resources. They are considered a solid hydrogen storage material with great application potential, however, their slow hydrogen absorption/desorption rate, high hydrogen absorption/desorption temperature, and relatively high activation energy and enthalpy limit their application in the field of hydrogen energy. Aiming at the current research on Mg-based solid hydrogen storage materials at home and abroad, this paper summarizes the improvement methods of Mg-based hydrogen storage materials, focusing on the effects of the addition of transition metal catalysts and carbon composite catalysts, as well as the construction of alloying, nanocrystallization, and composite systems on the hydrogen storage and desorption mechanism, microstructure, and dynamic/thermodynamic properties of Mg-based materials. Finally, the research results in this field are summarized, and the development trend and main challenges of magnesium-based hydrogen storage materials have been prospected.