▎ 摘　　要

NOVELTY - Preparing composite material loaded with nano magnesium hydride involves adding cationic surfactant in the aqueous dispersion of the two-dimensional transition metal carbide, wrinkling the two-dimensional transition metal carbide nano sheet, then washing and drying, putting the product into a sealed container, pumping the sealed container to vacuum, raising the temperature to 600-1000degrees Celsius, keeping the temperature for 2-5 hours, then filling 1-10 megaPascal hydrogen in the sealed container and keeping the temperature for 2-5 hours, adding the product and dibutyl magnesium into the organic solvent to obtain the mixture, ultrasonically dispersing the mixture, then under the condition of hydrogen pressure of 3-6 megaPascal, temperature of 180-220degrees Celsius, stirring and heating for 12-48 hours, centrifuging and drying to obtain product. USE - Method for preparing composite material loaded with nano magnesium hydride used in hydrogen storage (claimed) and to porous active carbon, carbon gel, graphene and carbon nano-tube. ADVANTAGE - The composite material of the two-dimensional transition metal carbide loaded nano magnesium hydride has high hydrogen storage density, fast hydrogen absorption and desorption dynamics performance and excellent cycle stability.