Process of preparing nanocomposites with activated interfaces prepared by mechanical milling of magnesium hydrides, and their use for hydrogen storage

摘要

B "NANOCOMPOST PREPARATION PROCESS WITH ACTIVATED INTERFACES PREPARED BY MECHANICAL GRINDING OF MAGNESIUM HYDROTES, AND USE OF THE SAME FOR HYDROGEN STORAGE" D The present invention relates to new nanocomposites having activated magnesium based or magnesium based interfaces. of a compound containing magnesium and another chemical element or compound known to be capable of absorbing hydrogen and to be poorly miscible with magnesium or its hydride, such as, for example, vanadium, titanium or niobium. The method is characterized by the sunmission of magnesium or a magnesium-based compound known to absorb hydrogen, to a hydrogenation, in order to obtain the corresponding hydride in the form of a powder. Said result in a hydride powder with another element or compound or with a hydride of said other element or compound which and the result of the mixture is subjected to intensive mechanical grinding in order to obtain the corresponding nanocomposite in the form of a hydride. Finally, if necessary, the nanocomposite result is subjected to hydrogen desorption. The invention is also related to the result of the Mg-based nanocomposite. which has the advantage of being expansive and highly sufficient for hydrogen storage, obtaining its microstructure (which has the nature of its interfaces and the spatial distribution of its constituents) in which it is extremely thin and provides an excellent synergistic effect between Mg and the other element or compound.