Magnesium-based hydrogen storage material based on refined ball-milled high-hardness dopant and preparation method of magnesium-based hydrogen storage material

The invention relates to the technical field of solid composite hydrogen storage materials, and particularly discloses a magnesium-based hydrogen storage material based on a refined ball-milled high-hardness dopant and a preparation method thereof.The magnesium-based hydrogen storage material is prepared from the high-hardness dopant and MgH2 through composite ball milling, the size of the composite hydrogen storage material is 1-5 microns, and the composite hydrogen storage material is dispersed and distributed in a small sheet shape; wherein the MgH2 is a base material, and the chemical formula of the high-hardness dopant is V80T i8Cr12, which is called V-T i-Cr alloy for short; the V80T i8Cr12 phase and the MgH2 phase are uniformly distributed; the hardness of the V-T i-Cr alloy is 235-240 HV, and the V-T i-Cr alloy must be subjected to refining ball milling; the magnesium alloy comprises a MgH2 phase and a V80T i8Cr12 phase, the content of the MgH2 phase ranges from 88% to 92%, and the content of the V80T