A kind of high-performance hydrogen storage alloy and preparation method thereof

A hydrogen storage alloy, high-performance technology, applied in metal material coating process, vacuum evaporation plating, coating, etc., to achieve superior performance, large degree of freedom of regulation, and controllable quality

Active Publication Date: 2018-10-09
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on the realization of coating on large particle hydrogen storage alloys.

Method used

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  • A kind of high-performance hydrogen storage alloy and preparation method thereof
  • A kind of high-performance hydrogen storage alloy and preparation method thereof
  • A kind of high-performance hydrogen storage alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The particle size of the prepared particles is 60-80μm, the thickness of the coated Pd film is 5nm, and the composition is Pd@Mg 77 Y 23 hydrogen storage alloy

[0029] 1) Ingredients

[0030] Use metal Mg and metal Y with a purity of more than 99.5% according to the design composition Mg 77 Y 23 Carry out batching, and consider certain burning loss (the burning loss of Y is set as 5wt%, Mg burning loss 15wt%);

[0031] 2) Alloy melting

[0032] The Mg-Y master alloy was prepared by high-vacuum high-frequency induction melting furnace. Put the raw materials prepared in step 1) in the graphite crucible of the high-vacuum high-frequency induction melting furnace, and evacuate until the background vacuum degree is higher than 5×10 -4 Pa, and then wash the furnace chamber with argon gas with a purity ≥ 99.999% for 3 times, and then start heating: first turn on the power to preheat the crucible for 20 seconds, then adjust the current to 120A to completely melt the allo...

Embodiment 2

[0041] The particle size of the prepared particles is 100-120μm, the thickness of the coated Pd film is 10nm, and the composition is Pd@Mg 77 Y 23 hydrogen storage alloy

[0042] 1) Ingredients

[0043] Use metal Mg and metal Y with a purity of more than 99.5% according to the design composition Mg 77 Y 23 Carry out batching, and consider certain burning loss (the burning loss of Y is set as 5wt%, Mg burning loss 15wt%);

[0044] 2) Alloy melting

[0045] The Mg-Y master alloy was prepared by high-vacuum high-frequency induction melting furnace. Put the raw materials prepared in step 1) in the graphite crucible of the high-vacuum high-frequency induction melting furnace, and evacuate until the background vacuum degree is higher than 5×10 -4 Pa, and then wash the furnace chamber with argon gas with a purity ≥ 99.999% for 3 times, and then start heating: first turn on the power to preheat the crucible for 20 seconds, then adjust the current to 120A to completely melt the a...

Embodiment 3

[0054] The particle size of the prepared particles is 60-80μm, the thickness of the coated Pd film is 20nm, and the composition is Pd@Mg 77 Y 23 hydrogen storage alloy

[0055] 1) Ingredients

[0056] Use metal Mg and metal Y with a purity of more than 99.5% according to the design composition Mg 77 Y 23 Carry out batching, and consider certain burning loss (the burning loss of Y is set as 5wt%, Mg burning loss 15wt%);

[0057] 2) Alloy melting

[0058] The Mg-Y master alloy was prepared by high-vacuum high-frequency induction melting furnace. Put the raw materials prepared in step 1) in the graphite crucible of the high-vacuum high-frequency induction melting furnace, and evacuate until the background vacuum degree is higher than 5×10 -4 Pa, and then wash the furnace chamber with argon gas with a purity ≥ 99.999% for 3 times, and then start heating: first turn on the power to preheat the crucible for 20 seconds, then adjust the current to 120A to completely melt the all...

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Abstract

The present invention discloses a high-performance hydrogen-storage alloy and a preparation method thereof, the high-performance hydrogen-storage alloy Pd @ Mg-Y is obtained by coating Pd with Mg100-xYx (x = 20-25) alloy particles, the particles size of the alloy particle is 50 to 150 microns, and Pd film thickness is 5-30nm. The preparation method is as follows: a Mg100-xYx (x = 20-25) master alloy ingot is prepared by vacuum melting method, hydrogen storage alloy inner-core particles with a particle size of 50 to 150 microns are obtained by mechanical crushing, and the surface of the Mg100-xYx (x = 20-25) inner-core particles is uniformly coat-plated with a Pd film by magnetron sputtering coating technology. Experimental results show that: hydrogen absorption and desorption rates of the hydrogen-storage alloy Pd @ Mg-Y obtained by the method are significantly faster than the hydrogen absorption and desorption rates of pure Mg of same size, so that the large particle size Pd @ Mg77Y23 hydrogen storage alloy has a good use prospect in hydrogen storage materials, as well as simplification of the preparation process.

Description

technical field [0001] The invention relates to a material and a preparation method thereof, in particular to a hydrogen storage alloy and a preparation method thereof. Background technique [0002] As a green energy, hydrogen occupies an important position in the future sustainable energy because of its cleanness, easy storage and abundant resources. So far, the key factor hindering the development of "hydrogen economy" is the storage of hydrogen. Therefore, the research and development of hydrogen storage materials has become one of the key links for the practical and large-scale utilization of hydrogen energy. As the anode material of nickel-metal hydride batteries in the largest application field, hydrogen storage alloys are required to have good discharge performance, long cycle life, and suitable hydrogen decomposition pressure. Magnesium-based hydrogen storage materials have become one of the most promising hydrogen storage materials due to their light weight, abunda...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/03C22C23/00C23C14/35B22F9/04B22F1/02
Inventor 王艳艳徐丽李星国
Owner STATE GRID CORP OF CHINA
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