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Nanocrystalline amorphous Mg-M-Y hydrogen storage alloy and preparation method and application thereof

A technology of hydrogen storage alloy and nanocrystal, which is applied in the field of high-efficiency hydrogen storage materials, can solve the problems of poor hydrogen absorption and desorption performance, and achieve the effect of increasing the rate of hydrogen absorption and desorption, and improving the rate of hydrogen absorption and desorption

Inactive Publication Date: 2017-09-22
YANTAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to develop a metastable nanocrystalline amorphous magnesium-based hydrogen storage material with high hydrogen storage capacity and fast hydrogen absorption and desorption, so as to solve the problem of poor hydrogen absorption and desorption performance of current magnesium-based hydrogen storage materials

Method used

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  • Nanocrystalline amorphous Mg-M-Y hydrogen storage alloy and preparation method and application thereof
  • Nanocrystalline amorphous Mg-M-Y hydrogen storage alloy and preparation method and application thereof
  • Nanocrystalline amorphous Mg-M-Y hydrogen storage alloy and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0022] The elemental powders of Mg, Y, and Ti are prepared in the following proportions, that is, 80% (weight) of Mg, 5% (weight) of Y, and 15% (weight) of Ti. The prepared Mg powder, Ti powder and Y powder Put into the ball mill tank, the ball-to-material ratio is 20:1, the particle size of Ti powder, Mg powder, and Y powder are all 10μm. After vacuuming, fill with hydrogen for reactive ball milling. The speed of the ball mill is 1200 rpm and the hydrogen pressure in the tank is maintained at 0.5 MPa, the ball milling interval is 2 hours to check the pressure change in the tank, add hydrogen to maintain the hydrogen pressure of the tank, the ball milling time is 40 hours, directly obtain nanocrystalline amorphous Mg 80 Ti 15 Y 5 alloy.

[0023] The alloy has a grain size of 10nm and a particle size of less than 500nm. The components are uniformly dispersed and the hydrogen absorption and desorption rate is significantly improved. The hydrogen absorption can reach 5.5 mass.% at 20...

Embodiment 2

[0025] The elemental powders of Mg, Y, and Al are prepared in the following proportions, that is, Mg is 85% by weight, Y is 9% by weight, and Al is 6% by weight. Place the prepared Mg powder, Al powder and Y powder Into the ball mill tank, the ball-to-material ratio is 30:1, the particle size of Al powder, Mg powder, and Y powder are all 20μm. After vacuuming, hydrogen is charged for reactive ball milling. The speed of the ball mill is 1300 rpm and the hydrogen pressure in the tank is maintained at 1.0 MPa. , The ball milling interval is 2 hours to check the pressure change in the tank, and add hydrogen to maintain the hydrogen pressure of the tank. The ball milling time is 60 hours to directly obtain nanocrystalline amorphous Mg. 85 Al 6 Y 9 alloy.

[0026] The alloy has a grain size of 8nm and a particle size of less than 500nm. The components are uniformly dispersed and the hydrogen absorption and desorption rate is significantly increased. The hydrogen absorption can reach 5.6...

Embodiment 3

[0030] The elemental powders of Mg, Y, and Ni are prepared in the following proportions, that is, Mg is 73% by weight, Y is 12% by weight, and Ni is 15% by weight. Place the prepared Mg powder, Ni powder and Y powder Into the ball mill tank, the ball-to-battery ratio is 40:1, the particle size of Ni powder, Mg powder, and Y powder are both 20μm. After vacuuming, hydrogen is charged for reactive ball milling. The speed of the ball mill is 1400 rpm, and the hydrogen pressure in the tank is 1.5MPa. The ball milling interval is 2 hours to check the pressure change in the tank, and add hydrogen to maintain the hydrogen pressure of the tank. The ball milling time is 40 hours to directly obtain nanocrystalline amorphous Mg. 73 Ni 15 Y 12 alloy.

[0031] The alloy has a grain size of 15nm and a particle size of less than 500nm. The components are uniformly dispersed and the hydrogen absorption and desorption rate is significantly improved. The hydrogen absorption can reach 5.3 mass.% at 2...

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Abstract

The invention relates to a nanocrystalline amorphous Mg-M-Y hydrogen storage alloy and a preparation method thereof. Specifically, the nanocrystalline amorphous magnesium-based hydrogen storage alloy is composed of three components, by weight, of 65-87% of Mg, 2-15% of Y and 4-23% of M; and the M is one of aluminum (Al), nickel (Ni), iron (Fe), cobalt (Co), manganese (Mn), vanadium (V), chromium (Cr), copper (Cu) or titanium (Ti). The preparation method of the nanocrystalline amorphous Mg-M-Y hydrogen storage alloy is that the nanocrystalline amorphous Mg-M-Y hydrogen storage alloy is directly obtained by adopting reaction ball mill under the hydrogen atmosphere. The process route is shortened, the material preparation efficiency is greatly improved, and by adoption of the obtained nanocrystalline amorphous Mg-M-Y alloy, the high hydrogen absorption and desorption speed rate and the hydrogen storage amount are achieved without activation.

Description

Technical field [0001] The invention relates to the field of high-efficiency hydrogen storage materials, in particular to a nanocrystalline amorphous Mg-M-Y hydrogen storage alloy synthesized through a reactive ball milling process under a hydrogen atmosphere and a preparation method thereof. technical background [0002] Clean energy is the foundation for human society to achieve sustainable development. In recent years, fossil fuels such as oil and coal have been depleted due to excessive exploitation, which has caused a profound energy crisis in human society. Hydrogen energy will be the future energy of mankind. Hydrogen is the most abundant substance on the earth. About 70% of the earth's surface is covered by water, which is an inexhaustible source of hydrogen. Hydrogen energy is the most environmentally friendly energy source. It uses fuel cell technology to convert hydrogen into electricity and water without pollution. In addition, hydrogen can be easily stored on a lar...

Claims

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Application Information

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IPC IPC(8): C22C23/06C22C23/02C22C23/00C22C45/00C22C1/04B22F9/04
CPCC22C23/06B22F9/002B22F9/04B22F2009/041B22F2999/00C22C1/0408C22C23/00C22C23/02C22C45/005C22C2200/02C22C2200/04C22C2202/04B22F2201/013
Inventor 李法兵
Owner YANTAI UNIV
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