Magnesium-based hydrogen storage material based on Mg-Ni-Gd alloy as well as preparation method and application of magnesium-based hydrogen storage material

The invention relates to a magnesium-based hydrogen storage material based on an Mg-Ni-Gd alloy as well as a preparation method and application of the magnesium-based hydrogen storage material, and belongs to the technical field of magnesium-based hydrogen storage materials. The magnesium-based hydrogen storage material is an Mg-Ni-Gd alloy and inevitable impurities, and the Mg-Ni-Gd alloy contains the following components in percentage by weight: 2%-12% of Gd, 2%-12% of Ni, the inevitable impurities and the balance of Mg. According to the magnesium-based hydrogen storage material, the hydrogen storage performance is improved through nanocrystallization and element self-catalysis effects, and the magnesium-based hydrogen storage material has the following advantages that (1) the magnesium-based hydrogen storage material has stable hydrogen storage cycle dynamic performance, and the hydrogen storage capacity can still be kept at 98.8% or above after 130 times of hydrogen absorption and desorption cycles; (2) t