▎ 摘　　要

NOVELTY - Magnesium hydroxide hydrogen storage material comprises (a) mixing magnesium powder and the three-dimensional graphene modified by the iron-nickel alloy nanoparticles, (b) subjecting the above mixture to high-energy ball milling under the protection of an inert gas, and the ball-to-material ratio is 10:1-30:1 and obtaining three-dimensional graphene-modified magnesium powder composite material modified by iron-nickel alloy nanoparticles, (c) loading the magnesium powder composite material into a hydraulic mold under the protection of an inert gas, pressing and molding to obtain a three-dimensional graphene-modified magnesium powder composite material blank, repeating the above steps to prepare multiple blanks, adding into a stainless steel container, and heating to 350-400degrees Celsius, and (d) performing activation process, the inner magnesium-based material of the tank body becomes a magnesium hydride hydrogen storage composite material. USE - The magnesium hydride hydrogen storage material is useful for preparation blank. ADVANTAGE - The method uses the advantages of high specific surface graphene and easy dispersion, and effectively improves the traditional technique of magnesium powder in the ball milling process, improving the efficiency of the high energy ball-milling. The catalyst for improving magnesium-based hydrogen storage material is loaded on the graphene sheet structure, in the process of ball-milling and absorbing and releasing hydrogen, the nano-particles will not agglomerate, fully exerting the action of the catalyst, and improving the service life of catalyst, ensuring the hydrogenation magnesium hydrogen storage tank for a long time stable operation. The method has low cost, short period, strong repeatability, and has wide application prospect in the hydrogen energy field.