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Normal-temperature activated rare earth hydrogen storage alloy and preparation method and application thereof

A hydrogen storage alloy and activation-type technology, which is applied in the field of materials, can solve the problems of high activation temperature, harsh activation treatment conditions, and unsuitability for mass production, and achieve high hydrogen absorption and desorption, suitable for mass production, and low cost. Effect

Pending Publication Date: 2021-11-30
JIANGXI INST OF RARE EARTHS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the hydrogen storage cycle performance has been improved, the activation treatment conditions are harsh and the activation temperature required is high, which is not suitable for mass production

Method used

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  • Normal-temperature activated rare earth hydrogen storage alloy and preparation method and application thereof
  • Normal-temperature activated rare earth hydrogen storage alloy and preparation method and application thereof
  • Normal-temperature activated rare earth hydrogen storage alloy and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] This embodiment provides a normal temperature activation type rare earth hydrogen storage alloy, the composition of the normal temperature activation type rare earth hydrogen storage alloy is: Ti 0.8 Zr 0.2 Cr 0.75 mn 1.25 Ce 0.02 , the preparation method of the normal temperature activation type rare earth hydrogen storage alloy comprises the following steps:

[0052] (1) According to the molar ratio of 0.8:0.2:0.75:1.25:0.02, Ti, Zr, Cr, Mn and rare earth element Ce are mixed, and a non-consumable electric arc furnace is used for a 200s primary smelting under an argon atmosphere. The smelting current It is 130A, after the copper crucible is cooled to room temperature, it is turned over, and the melting is repeated 4 times to obtain an alloy ingot;

[0053] (2) After evacuating to a vacuum degree of 0.0001Pa, argon gas is introduced, and the alloy ingots described in step (1) are annealed at 1100°C for 2.5 hours in an argon atmosphere; then placed in a PCT test at ...

Embodiment 2

[0056] This embodiment provides a normal temperature activation type rare earth hydrogen storage alloy, the composition of the normal temperature activation type rare earth hydrogen storage alloy is: Ti 0.7 Zr 0.3 Cr 0.7 mn 1.3 Ce 0.03 , the preparation method of the normal temperature activation type rare earth hydrogen storage alloy comprises the following steps:

[0057] (1) According to the molar ratio of 0.7:0.3:0.7:1.3:0.03, Ti, Zr, Cr, Mn and rare earth element Ce are mixed, and a non-consumable electric arc furnace is used for 150s of primary smelting in an argon atmosphere. The smelting current 150A, after the copper crucible is cooled to room temperature, it is turned over, and the melting is repeated 3 times to obtain an alloy ingot;

[0058] (2) After evacuating to a vacuum degree of 0.00008Pa, helium is introduced, and the alloy ingot described in step (1) is annealed at 1000°C for 3 hours in an argon atmosphere; then placed in PCT testing equipment at 20°C T...

Embodiment 3

[0060] This embodiment provides a normal temperature activation type rare earth hydrogen storage alloy, the composition of the normal temperature activation type rare earth hydrogen storage alloy is: Ti 0.6 Zr 0.4 Cr 1.0 mn 1.0 Ce 0.01 , the preparation method of the normal temperature activation type rare earth hydrogen storage alloy comprises the following steps:

[0061] (1) According to the molar ratio of 0.6:0.4:1.0:1.0:0.01, Ti, Zr, Cr, Mn and rare earth element Ce are mixed, and a non-consumable electric arc furnace is used for a 250s primary smelting under an argon atmosphere. The smelting current 100A, after the copper crucible is cooled to room temperature, it is turned over, and the melting is repeated 5 times to obtain an alloy ingot;

[0062] (2) After evacuating to a vacuum degree of 0.00009Pa, argon is introduced, and the alloy ingot described in step (1) is sequentially annealed at 1200°C for 2 hours under an argon atmosphere; then placed in PCT testing equ...

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Abstract

The invention provides a normal-temperature activated rare earth hydrogen storage alloy and a preparation method and application thereof. The normal-temperature activated rare earth hydrogen storage alloy has a composition general formula of TizZr1-zCrxMn2-xMy, wherein x is more than or equal to 0.6 and less than or equal to 1.5, y is more than or equal to 0.01 and less than or equal to 0.05, z is more than or equal to 0.5 and less than or equal to 0.8, and m comprises rare earth elements. The preparation method of the normal-temperature activated rare earth hydrogen storage alloy comprises the following steps: mixing the raw materials according to the element proportion in the composition general formula of the normal-temperature activated rare earth hydrogen storage alloy, and sequentially smelting, annealing and activating the raw materials to obtain the normal-temperature activated rare earth hydrogen storage alloy. The normal-temperature activated rare earth hydrogen storage alloy is obtained through the simple preparation method, activation can be achieved under the condition that the temperature is smaller than or equal to 25 DEG C, and the alloy has the beneficial effects of being low in cost, high in hydrogen absorption and desorption amount, easy to activate and good in cycling stability.

Description

technical field [0001] The invention belongs to the technical field of materials and relates to a hydrogen storage alloy, in particular to a normal temperature activated rare earth hydrogen storage alloy and its preparation and application. Background technique [0002] Since the combustion of hydrogen produces water, it will not pollute the environment, and the heat of combustion is about 3 times that of gasoline, 3.9 times that of alcohol, and 4.5 times that of coke, so hydrogen energy is one of the sustainable and clean energy sources that can replace traditional fossil fuels. Efficient and safe storage of hydrogen is the key to the use of hydrogen energy. At present, there are many ways to store hydrogen, mainly including high-pressure gaseous hydrogen storage, low-temperature liquid hydrogen storage, and solid-state hydrogen storage. However, these hydrogen storage methods have high costs, high risk factors, poor safety performance, and are not suitable for large-scale ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C22C1/02C22F1/02C01B3/00
CPCC22C30/00C22C22/00C22C1/02C22F1/02C22F1/16C22F1/11C22C27/06C01B3/0052Y02E60/32
Inventor 陈庆军周璐马传明
Owner JIANGXI INST OF RARE EARTHS CHINESE ACAD OF SCI
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