The invention discloses a method for directly synthesizing a
hydrogen storage material of
metal coordination
hydride by a reaction ball milling, which is characterized in that
metal coordination
hydride which is expressed in a chemical general formula as MNH4 is directly synthesized in a step by the reaction ball milling method and through controlling the hydrogenation pressure and the time of the ball milling, wherein the chemical general formula, M is one or two of Li and Na, and N is one or two of B and Al, the
transition metal such as Ti, Zr and Ni,
transition metal halide such as TiF3, HfCl3, TiCl4, and ScCl3, rare-earth
chloride such as LaCl3, CeCl3, PrCl3, NdCl3, and SmCl3 are acted as the catalyst during the synthesis process. The method for directly synthesizing the
hydrogen storage material has the advantages of only taking one step of the reaction ball milling to directly synthesize the final product of coordinate
metal hydride at a
room temperature, having simple operation, low
energy consumption, safety, and reliability, enjoying high
yield rate of the synthesized
hydrogen storage material, and possessing high capacity of reversible hydrogen charging and discharging circulation at a low and
intermediate temperature.