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

A technology of stencil reagent and hydrogen storage material, applied in chemical instruments and methods, metal material coating process, hydrogen, etc., can solve problems such as hindering the practical process, hindering hydrogen permeability, decreasing hydrogen storage capacity, etc., and reducing magnesium The effect of reducing the activation energy of hydrogen absorption reaction, reducing the activation energy of hydrogen desorption reaction, and increasing the rate of hydrogen desorption

Active Publication Date: 2021-10-12
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Preparation method of polyaniline and Grignard reagent in-situ modification of rare earth magnesium-based hydrogen storage materials
  • Preparation method of polyaniline and Grignard reagent in-situ modification of rare earth magnesium-based hydrogen storage materials

Examples

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Embodiment 1

[0033] Example 1: Preparation of covering flux for magnesium alloy smelting

[0034]The powders of anhydrous magnesium chloride, anhydrous potassium chloride, anhydrous barium chloride and anhydrous calcium fluoride in a mass ratio of 4:4:1:1 are ball milled and mixed for 1 hour to obtain a magnesium alloy smelting covering flux.

Embodiment 2

[0035] Example 2: La 2 Mg 17 Alloy Preparation

[0036] The powders of anhydrous magnesium chloride, anhydrous potassium chloride, anhydrous barium chloride and anhydrous calcium fluoride in a mass ratio of 4:4:1:1 are ball milled and mixed for 1.5 hours to obtain a magnesium alloy smelting covering flux.

[0037] Place small pieces of metal magnesium and metal lanthanum in a molar ratio of 8.5:1 in a crucible with the above-mentioned smelting covering flux (more than 2cm, the same below) spread on the bottom to form a material bed, and lay a layer of smelting on the material bed. Cover the flux, cover the crucible lid, and place it in a well-type furnace; heat up to 700°C at a rate of 10°C / min, and maintain it for 2 hours; cool to room temperature, turn the sample over, and place it again on the bottom with a melting cover The crucible of flux, and then lay a layer of melting covering flux on it, cover the crucible lid, and carry out turning over melting; after turning over...

Embodiment 3

[0038] Example 3: CeMg 12 Alloy Preparation

[0039] The powders of anhydrous magnesium chloride, anhydrous potassium chloride, anhydrous barium chloride and anhydrous calcium fluoride in a mass ratio of 4:4:1:1 are ball milled and mixed for 2 hours to obtain a magnesium alloy smelting covering flux.

[0040] Place small pieces of metal magnesium and metal cerium in the bottom of the crucible with the above-mentioned smelting covering flux at a molar ratio of 12:1 to form a material bed, and lay a layer of smelting covering flux on the material bed, and cover the crucible cover , placed in a well-type furnace; heated to 775°C at a rate of 10°C / min, and maintained for 1.5 hours; cooled to room temperature, turned the sample over, and placed it back in a crucible covered with melting flux on the bottom, and then Lay a layer of smelting covering flux on the top, cover the crucible lid, and carry out turning smelting; after 2 times turning and remelting, CeMg is obtained after co...

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Abstract

The invention relates to metal material hydrogen storage technology, and aims to provide a preparation method of polyaniline and Grignard reagent in-situ modified rare earth magnesium-based hydrogen storage material. Including: use anhydrous magnesium chloride, anhydrous potassium chloride, anhydrous barium chloride, anhydrous calcium fluoride, and ball milling to obtain a smelting covering flux; Obtain massive rare earth magnesium alloy, and collect debris; add the initiator solution dropwise to the aniline solution, and obtain small molecule polyaniline through polymerization; dissolve in water and heat and evaporate to obtain polyaniline prepolymerization solution; add rare earth magnesium alloy Detritus, stirred and reacted, filtered and dried to obtain the product. The invention is beneficial to reduce the activation energy of the hydrogen desorption reaction, reduce the dehydrogenation temperature and increase the dehydrogenation speed. Reduce the activation energy of magnesium hydrogen absorption reaction, reduce the hydrogen absorption temperature of rare earth magnesium alloy, and increase the hydrogen absorption speed. Can be used to manufacture portable and mobile power supplies for commercial applications, used in electric vehicles, electronic products, etc.

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/02C22C1/06C22C23/06C23C22/68B22F1/02C01B3/00
CPCY02E60/32
Inventor 刘宾虹高子钧李洲鹏
Owner ZHEJIANG UNIV
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