High-volume light-weight graphene catalysis rare earth aluminum magnesium based hydrogen storage material and preparation method thereof

A hydrogen storage material and graphene technology, applied in the field of hydrogen storage materials, can solve the problems of difficult to achieve rapid charging and discharging, high thermodynamic stability, harsh conditions for hydrogen absorption and desorption, etc.

Active Publication Date: 2018-06-29
CENT IRON & STEEL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its hydrogen absorption and desorption conditions are relatively harsh, and its thermodynamic stability is high. The hydride is not easy to decompose, and it is difficult to realize rapid hydrogen charging and discharging.

Method used

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  • High-volume light-weight graphene catalysis rare earth aluminum magnesium based hydrogen storage material and preparation method thereof
  • High-volume light-weight graphene catalysis rare earth aluminum magnesium based hydrogen storage material and preparation method thereof
  • High-volume light-weight graphene catalysis rare earth aluminum magnesium based hydrogen storage material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The preparation formula is La 5 Mg 85 Al 10 A high-capacity lightweight graphene-catalyzed rare-earth magnesium-aluminum-based hydrogen storage material, in which GR accounts for 5% of the final hydrogen storage material based on mass percentage content. The preparation method steps are as follows:

[0041] a. Weighing: according to the chemical formula La 5 Mg 85 Al 10 Weigh the required raw materials. Weigh 452g of rare earth lanthanum ingots, 1380g of metal magnesium ingots and 168g of metal aluminum ingots with a purity greater than 99.5%. Among them, metal magnesium and lanthanum increase the burning loss by 8% and 5% respectively on the basis of the theoretical ratio;

[0042] b. Melting: Put the weighed raw materials (total 2kg) in the medium frequency induction melting furnace. Vacuum the furnace to 10 - 3 After Pa, inject 0.04MPa helium gas for protection. After preheating the crucible for 30 minutes, adjust the power to 5-20kW until the alloy is comp...

Embodiment 2

[0048] The preparation formula is Ce 5 Mg 85 Al 10 A high-capacity lightweight graphene-catalyzed rare-earth magnesium-aluminum-based hydrogen storage material, in which GR accounts for 5% of the final hydrogen storage material based on mass percentage content. The preparation method steps are as follows:

[0049] a. Weighing: Composition Ce according to chemical formula 5 Mg 85 Al 10 Weigh the required raw materials. Weigh 455g of rare earth cerium ingots, 1380g of metal magnesium ingots and 165g of metal aluminum ingots with a purity greater than 99.5%. Among them, metal magnesium and cerium increase the burning loss by 8% and 5% respectively on the basis of the theoretical ratio;

[0050] b. Melting: Put the weighed raw materials (total 2kg) in the medium frequency induction melting furnace. Vacuum the furnace to 10 - 3 After Pa, inject 0.04MPa helium gas for protection. After preheating the crucible for 30 minutes, adjust the power to 5-20kW until the alloy is co...

Embodiment 3

[0056] The preparation formula is Pr 5 Mg 85 Al 10 A high-capacity lightweight graphene-catalyzed rare-earth magnesium-aluminum-based hydrogen storage material, in which GR accounts for 5% of the final hydrogen storage material based on mass percentage content. The preparation method steps are as follows:

[0057] a. Weighing: Composition of Pr according to chemical formula 5 Mg 85 Al 10 Weigh the required raw materials. Weigh 459g of rare earth praseodymium ingots, 1380g of metal magnesium ingots and 161g of metal aluminum ingots with a purity greater than 99.5%. Among them, metal magnesium and praseodymium increase the burning loss by 8% and 5% respectively on the basis of the theoretical ratio;

[0058] b. Melting: Put the weighed raw materials (total 2kg) in the medium frequency induction melting furnace. Vacuum the furnace to 10 - 3 After Pa, inject 0.04MPa helium gas for protection. After preheating the crucible for 30 minutes, adjust the power to 5-20kW until ...

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Abstract

The invention relates to a high-volume light-weight graphene catalysis rare earth aluminum magnesium based hydrogen storage material and a preparation method thereof. The hydrogen storage material isprepared from rare earth aluminum magnesium based hydrogen storage alloy and graphene catalysts GR, wherein the rare earth aluminum magnesium based hydrogen storage alloy has a formula chemical formula of ReaMg100-a-b-cAlbNic, wherein the Re is one kind of materials of rare earth elements of lanthanum, cerium, praseodymium and neodymium; the a, the b and the c are the atom percentage of the corresponding element; the a is greater than or equal to 5 but smaller than or equal to 20; the b is greater than or equal to 5 but smaller than or equal to 40; the c is greater than or equal to 0 but smaller than or equal to 10; the sum of the b and the c is greater than or equal to 10 but smaller than or equal to 40; the proportion of the mass percentage of the graphene catalysts GR in the final hydrogen storage material is greater than or equal to 1 percent but smaller than or equal to 10 percent. The Mg and AL which has rich reserves in the nature and low price are used as major composition elements; meanwhile, different kinds and contents of rare earth elements are added in the alloy side A; different contents of Ni elements are added at the side B; graphene is added for ball milling. The hydrogen storage material prepared by the method has the characteristics of high hydrogen adsorption and release speed, high hydrogen storage capacity, small platform hysteresis and low hydrogen release temperature.

Description

technical field [0001] The invention belongs to the technical field of hydrogen storage materials, in particular to a high-capacity lightweight graphene-catalyzed rare-earth magnesium-aluminum-based hydrogen storage material and a preparation method. Background technique [0002] At present, my country's energy and environmental systems are facing huge challenges. As a major player in oil consumption and carbon dioxide emissions, automobiles need to be fundamentally changed. According to data from the Ministry of Environmental Protection of China and the US Energy Foundation: my country has been the world's largest motor vehicle production and sales country for eight consecutive years, and China's motor vehicles consume 85% of the country's total oil production every year. Motor vehicle exhaust pollution has become an important source of air pollution in my country. Therefore, the development of new transportation tools driven by clean energy is a necessary measure for our ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/06C22C23/00C22C30/00C22C1/02B22F9/08H01M4/38
CPCB22F9/082C22C1/02C22C23/00C22C23/06C22C30/00H01M4/383H01M4/466Y02E60/10
Inventor 李亚琴尚宏伟祁焱郭世海张羊换赵栋梁
Owner CENT IRON & STEEL RES INST
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