| abstract |
Disclosed is a method for in-situ preparation of nano-magnesium hydride. The method comprises placing magnesium chloride and lithium hydride in an organic solvent and stirring same under the protection of an inert atmosphere so as to obtain an organic turbid liquid of the mixture; subjecting the organic turbid liquid to an ultrasonic treatment, so as to promote a chemical reaction of the mixture to occur, and filtering same after the reaction is finished; and washing, centrifuging and drying a solid reaction product, and removing residual organics, so as to obtain the nano-magnesium hydride. In the method, the energy provided by a cavitation effect generated by an ultrasonic wave in a liquid medium promotes the chemical reaction between magnesium chloride and lithium hydride. Since the cavitation effect can instantaneously provide a large amount of energy in a very small range, the prepared product particles cannot easily grow compared to traditional energy supply through heating and mechanical force; at the same time, the agglomeration of nanoparticles is inhibited using the crush action of the ultrasonic waves, avoiding side effects caused by addition of various carrier materials for inhibiting the growth of the particles, thereby obtaining nano-scaled magnesium hydride with an improved effective hydrogen storage capacity. |