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High-entropy hydrogen storage alloy and preparation method thereof

A hydrogen storage alloy, high-entropy technology, applied to chemical instruments and methods, hydrogen, non-metallic elements, etc., can solve the problems of poor activation performance, high hydrogen absorption and desorption temperature, and small hydrogen absorption and desorption, and achieve simple process , fast hydrogen absorption and desorption, and low cost

Active Publication Date: 2022-06-28
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the problems of low hydrogen absorption and desorption capacity, poor activation performance, high hydrogen absorption and desorption temperature, and large hysteresis of hydrogen storage materials in the prior art, the present invention The purpose is to provide a high-entropy hydrogen storage alloy with high hydrogen storage capacity, reversible hydrogen absorption and desorption at room temperature and small hysteresis; at the same time, it does not contain rare earth elements, has low cost and does not need to be activated before use

Method used

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  • High-entropy hydrogen storage alloy and preparation method thereof
  • High-entropy hydrogen storage alloy and preparation method thereof
  • High-entropy hydrogen storage alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Ti 18 Zr 15 Cr 17 Mn 18 Fe 8 Co 17 V 7 The specific preparation steps of the high-entropy alloy are as follows:

[0044] (1) each element of high purity is used as material, each component raw material is weighed according to the atomic ratio of the subscript of chemical formula, and the total trace amount of raw material taken is (50 ± 0.01) g;

[0045] (2) Put the weighed raw materials of each component into the water-cooled crucible in the high-vacuum arc melting furnace according to the degree of volatility of the components (Mn is volatile at the bottom), turn on the cooling water, close the furnace door, first Open the roughing valve. After one or two minutes, close the roughing valve, fill in a little argon, and discharge the air that may remain in the pipeline. Then open the roughing valve and molecular pump, and wait until the vacuum in the furnace reaches 2*10 -3 After Pa, fill with argon as protective gas;

[0046] (3) First, smelt the pure titanium a...

Embodiment 2

[0049] Ti 20 Zr 13 Cr 17 Mn 25 Fe 5 Co 13 V 7 The specific preparation steps of the high-entropy alloy are as follows:

[0050] (1) each element of high purity is used as material, each component raw material is weighed according to the atomic ratio of the subscript of chemical formula, and the total trace amount of raw material taken is (50 ± 0.01) g;

[0051] (2) Put the weighed raw materials of each component into the water-cooled crucible in the high-vacuum arc melting furnace according to the degree of volatility of the components (Mn is volatile at the bottom), turn on the cooling water, close the furnace door, first Open the roughing valve. After one or two minutes, close the roughing valve, fill in a little argon, and discharge the air that may remain in the pipeline. Then open the roughing valve and molecular pump, and wait until the vacuum in the furnace reaches 2*10 -3 After Pa, fill with argon as protective gas;

[0052] (3) First, smelt the pure titanium a...

Embodiment 3

[0055] Ti 24 Zr 10 Cr 17 Mn 30 Fe 5 Co 7 V 7 The specific preparation steps of the high-entropy alloy are as follows:

[0056] (1) each element of high purity is used as material, each component raw material is weighed according to the atomic ratio of the subscript of chemical formula, and the total trace amount of raw material taken is (50 ± 0.01) g;

[0057] (2) Put the weighed raw materials of each component into the water-cooled crucible in the high-vacuum arc melting furnace according to the degree of volatility of the components (Mn is volatile at the bottom), turn on the cooling water, close the furnace door, first Open the roughing valve. After one or two minutes, close the roughing valve, fill in a little argon, and discharge the air that may remain in the pipeline. Then open the roughing valve and molecular pump, and wait until the vacuum in the furnace reaches 2*10 -3 After Pa, fill with argon as protective gas;

[0058] (3) First, smelt the pure titanium at...

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Abstract

The invention discloses a high-entropy hydrogen storage alloy. The molecular general formula of the high-entropy hydrogen storage alloy is Ti Zr Cr < c > Mn < d > Fe < x > Co < y > V < z >, wherein 16 < = a < = 28 at%, 5 < = b < = 16 at%, 5 < = c < = 23 at%, 16 < = d < = 30 at%, 5 < = x < = 12 at%, 5 < = y < = 16 at%, 5 < = z < = 8 at%, and a + b + c + d + x + y + z = 100. The invention further discloses a preparation method of the high-entropy hydrogen storage alloy. The high-entropy hydrogen storage alloy disclosed by the invention has high hydrogen storage capacity, and is relatively small in hysteresis while reversibly absorbing and desorbing hydrogen at room temperature; meanwhile, rare earth elements are not contained, the cost is low, activation is not needed before use, and wide application prospects are achieved in the fields of new energy and the like.

Description

technical field [0001] The invention relates to a hydrogen storage material, in particular to a high-entropy hydrogen storage alloy and a preparation method thereof. Background technique [0002] Energy is an important material basis for the production and development of human society. Up to now, the world's energy mainly comes from the combustion and processing of fossil energy, and at the same time, the environmental problems caused are becoming more and more serious. Therefore, the development of clean energy has become a hot issue that the world pays attention to. Discussion and research on renewable energy sources such as hydrogen, wind and solar energy are also in full swing. Among them, the storage of hydrogen is the key to hydrogen energy research. [0003] The storage of hydrogen is mainly divided into gaseous hydrogen storage, liquid hydrogen storage and solid hydrogen storage. Gaseous hydrogen storage is mainly through high-pressure gas tanks. This method store...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C22C1/02C01B3/00
CPCC22C30/00C22C1/02C01B3/0031C22C2202/04
Inventor 刘江文王胤涂兵
Owner SOUTH CHINA UNIV OF TECH
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