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Preparation method of metal oxide composite magnesium hydride hydrogen storage material

A technology for composite magnesium hydride and hydrogen storage materials, which is applied in the field of preparation of metal oxide composite magnesium hydride hydrogen storage materials, can solve the problems that the hydrogen desorption performance of MgH2 does not show improvement, and achieve significant kinetic performance, eliminate agglomeration, and composition reasonable effect

Pending Publication Date: 2020-04-10
世能氢电科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And the addition of aluminum to MgH 2 The dehydrogenation performance of the

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The preparation method of the metal oxide composite magnesium hydride hydrogen storage material is as follows: using magnesium hydride as a base material, mixing metal oxide particles, the mass percentage of each component in the mixture is: magnesium hydride 99%, α- Fe 2 o 3 1%; the mixture is charged with hydrogen in a ball mill, and charged with hydrogen (0.4MPa) in a planetary ball mill for 80h, the ball-to-material ratio is 20:1, and the ball milling speed is 180r / min, and the obtained metal oxide is compositely hydrogenated The particle size of the magnesium hydrogen storage material is 28.0-60.0nm.

[0016] The hydrolysis rate of the obtained composite magnesium hydride hydrogen storage material increases significantly with the increase of temperature. At a normal temperature of 25°C, the composite magnesium hydride hydrogen storage material is hydrolyzed in twice distilled water for 15 minutes to release hydrogen gas of 65% of the theoretical hydrogen storage ...

Embodiment 2

[0018] The preparation method of the metal oxide composite magnesium hydride hydrogen storage material is as follows: using magnesium hydride as a base material, mixing metal oxide particles, the mass percentage of each component in the mixture is: magnesium hydride 98%, TiO 2 2%; the mixed material is charged with hydrogen in a ball mill, and charged with hydrogen (0.4MPa) in a planetary ball mill for 80h, the ball-to-material ratio is 20:1, and the ball milling speed is 180r / min, and the obtained metal oxide is compositely hydrogenated The particle size of the magnesium hydrogen storage material is 28.0-60.0nm.

[0019] The hydrolysis rate of the obtained composite magnesium hydride hydrogen storage material increases significantly with the increase of temperature. At room temperature of 25°C, the composite magnesium hydride hydrogen storage material is hydrolyzed in twice distilled water for 15 minutes to release hydrogen gas of 68.6% of the theoretical hydrogen storage cap...

Embodiment 3

[0021] The preparation method of the metal oxide composite magnesium hydride hydrogen storage material is as follows: using magnesium hydride as a base material, mixing metal oxide particles, the mass percentage of each component in the mixture is: magnesium hydride 97%, CeO 2 3%; the mixture is charged with hydrogen in a ball mill, and charged with hydrogen (0.4MPa) in a planetary ball mill for 100h, the ball-to-material ratio is 20:1, and the ball milling speed is 180r / min, and the obtained metal oxide is compositely hydrogenated The particle size of the magnesium hydrogen storage material is 28.0-60.0nm.

[0022] The hydrolysis rate of the obtained composite magnesium hydride hydrogen storage material increases significantly with the increase of temperature. At room temperature of 25°C, the composite magnesium hydride hydrogen storage material is hydrolyzed in seawater for 15 minutes to release hydrogen gas of 63.3% of the theoretical hydrogen storage capacity. At 50°C , t...

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Abstract

The invention belongs to the technical field of hydrogen storage materials, and particularly relates to a preparation method of a metal oxide composite magnesium hydride hydrogen storage material. Themethod comprises the steps that magnesium hydride serves as a base material, metal oxide particles are mixed, the mass percentage content of metal oxide in the mixture is 1%-8%, and the mixture is subjected to hydrogen filling ball milling in a ball mill to obtain the metal oxide composite magnesium hydride hydrogen storage material. By adding the nanoscale metal oxide particles, the hydrogenation speed of the magnesium-based composite powder in the hydrogen charging ball milling process can be increased, and reduction of the particle size of magnesium hydride is facilitated; the nanocrystalline MgH2 is coated with the metal oxide to form a core-shell structure with an excellent synergistic effect, the core-shell structure has a good catalytic effect and remarkable dynamic performance, the hydrogen storage reaction speed can be improved, microcell heat release can be controlled, agglomeration of a hydrogen storage reactant Mg (OH) 2 can be effectively eliminated through the metal oxide, and the hydrogen storage efficiency is improved. Therefore, the purpose of sufficient hydrolysis reaction is achieved.

Description

technical field [0001] The invention belongs to the technical field of hydrogen storage materials, and in particular relates to a preparation method of a metal oxide composite magnesium hydride hydrogen storage material. Background technique [0002] Energy development and environmental protection have become the strategic core of the sustainable development of human society. The gradual depletion of fossil energy forces people to seek renewable and clean energy. Hydrogen energy is recognized as the most promising secondary energy source in the 21st century due to its cleanliness, high efficiency and renewable energy. At present, fuel cells using hydrogen as fuel have been gradually popularized and applied in practical fields such as automobiles, but their wide application needs to solve three main problems, namely, the economical production of hydrogen, safe storage and transportation, and efficient use. The safe storage and transportation of hydrogen is a bottleneck in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/00
CPCC01B3/0078Y02E60/32
Inventor 王鸣付强张方于如军官凤钢陈艳艳杨昆吕俊囡杨列宁赵增殿夏先畅郝晓明
Owner 世能氢电科技有限公司
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