Lithium niobate-doped modified Mg-based hydrogen storage material and preparation method thereof

The invention provides a lithium niobate-doped modified Mg-based hydrogen storage material and a preparation method thereof, and relates to the technical field of magnesium-based solid hydrogen storage materials. The preparation method comprises the following steps: carrying out ball milling on MgH2 and lithium niobate in an inert gas or hydrogen atmosphere to obtain an efficient magnesium-based hydrogen storage material; in the hydrogen storage material, the mass fraction of the catalyst is 2-20 wt.%. Compared with a material not doped with a lithium niobate catalyst, the magnesium-based hydrogen storage material obtained after ball milling of lithium niobate and MgH2 has the advantages that the catalyst has excellent catalytic activity, the hydrogen absorption and desorption performance of the magnesium-based hydrogen storage material can be further improved, the hydrogen absorption and desorption temperature is remarkably reduced, and the hydrogen absorption and desorption speed is increased. The magnesium