Preparation method of polyaniline and Grignard reagent in-situ modified rare earth magnesium-based hydrogen storage material

Abstract

The invention relates to a metal material hydrogen storage technology, and aims to provide a preparation method of a polyaniline and Grignard reagent in-situ modified rare earth magnesium-based hydrogen storage material. The preparation method comprises the following steps of ball-milling and mixing anhydrous magnesium chloride, anhydrous potassium chloride, anhydrous barium chloride and anhydrous calcium fluoride to obtain a smelting covering flux; turning over and remelting the smelting covering flux, blocky magnesium metal and rare earth metal twice, cooling to obtain blocky rare earth magnesium alloy, and filing chippings; dropwise adding an initiator solution into an aniline solution, and polymerizing to obtain micromolecular polyaniline; dissolving in water, heating and evaporating to obtain a polyaniline pre-polymerization solution; and adding rare earth magnesium alloy chips, stirring for reaction, filtering, and drying to obtain the product. The hydrogen desorption reaction activation energy can be reduced, the hydrogen desorption temperature can be reduced, and the hydrogen desorption speed can be increased. The hydrogen absorption reaction activation energy of magnesium is reduced, the hydrogen absorption temperature of rare earth magnesium alloy is reduced, and the hydrogen absorption speed is increased. The preparation method can be used for manufacturing commercially applied portable and mobile power supplies, and is applied to electric vehicles, electronic products and the like.

Description

technical field [0001] The invention relates to metal material hydrogen storage technology, in particular to a preparation method of polyaniline and Grignard reagent in-situ modification of rare earth magnesium-based hydrogen storage materials. Background technique [0002] Hydrogen energy is clean, environmentally friendly, and renewable, and is considered to be the most ideal secondary energy source in the 21st century. Proton exchange membrane-electrolyte fuel cell (PEMFC) technology has become increasingly mature. There are two types of storage of hydrogen as a fuel cell fuel, physical method and chemical method. Physical methods mainly include: liquid hydrogen storage, high-pressure hydrogen storage, glass microsphere storage, underground cavern storage, activated carbon adsorption storage, and carbon nanotube storage (including some chemical adsorption storage). Chemical methods mainly include: metal hydride storage, organic liquid hydride storage, inorganic storage a...

AI Technical Summary

Problems solved by technology

Although this layer of dense oxide film prevents the further oxidation of metal magnesium and plays a role of surface protection, it also hinders the permeability of hydrogen, resulting in difficult activation, slow hydrogen absorption and desorption rate of metal magnesium, and the actual hydrogen absorption and desorption temperature is relatively high. High, which seriously hinders the process of its practical application

The main methods to improve the hydrogen absorption and desorption performance of magnesium are: first, alloying, which catalyzes the hydrogen absorption and desorption reaction by adding alloy elements, but this usually leads to an increase in the alloy density and a decrease in the hydrogen storage capacity

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