Metal oxide and porous material composite hydrogen storage material and preparation method thereof

A technology for porous materials and hydrogen storage materials, applied in the field of metal oxide and porous material composite hydrogen storage materials and their preparation, can solve the problems of poor kinetic performance, high hydrogen absorption and desorption temperature, increased material cost, etc., and achieve good characteristics , fully hydrolysis reaction, improve the effect of exothermic

Pending Publication Date: 2020-04-07
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

However, magnesium has not been used in practice due to its high hydrogen absorption and desorption temperature and poor kinetic properties.
Chinese patent CN1204282C discloses a material with a high hydrogen storage capacity. Although the hydrogen charging and discharging kinetics and thermodynam

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The metal oxide and porous material composite hydrogen storage material is based on magnesium hydride, mixed with metal oxide particles, and 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, 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, the obtained activated magnesium hydride material particles The diameter is 28-60nm.

[0018] The obtained activated magnesium hydride material is mixed with graphite with a particle size of 15 μm at a mass ratio of 100:1, and compressed by a granulator to obtain a composite hydrogen storage material.

[0019] 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...

Embodiment 2

[0021] The metal oxide and porous material composite hydrogen storage material is based on magnesium hydride, mixed with metal oxide particles, and the mass percentage of each component in the mixture is: magnesium hydride 98%, TiO 2 2%; 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 activated magnesium hydride material particles obtained are The diameter is 28-60nm.

[0022] The obtained activated magnesium hydride material was mixed with active Al with a particle size of 5 μm 2 o 3 Mixed at a mass ratio of 100:1, compressed by a granulator to obtain a composite hydrogen storage material.

[0023] 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 storag...

Embodiment 3

[0025] The metal oxide and porous material composite hydrogen storage material is based on magnesium hydride, mixed with metal oxide particles, and 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 80h, the ball-to-material ratio is 20:1, and the ball milling speed is 180r / min, and the activated magnesium hydride material particles obtained are The diameter is 28-60nm.

[0026] The obtained activated magnesium hydride material and SiO with a particle size of 15 μm 2 Mix according to the mass ratio of 100:0.5, and compress through a granulator to obtain a composite hydrogen storage material.

[0027] 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 ...

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Abstract

The invention belongs to the technical field of hydrogen storage materials and particularly relates to a metal oxide and porous material composite hydrogen storage material and a preparation method thereof. The metal oxide and porous material composite hydrogen storage material is formed by compounding magnesium hydride, a porous material and a metal oxide, and the weight ratio of the magnesium hydride to the porous material to the metal oxide is (100-10): (5-0.1): (1-0.05). The magnesium hydride is taken as a base material, and metal oxide particles are mixed and grinded to obtain an activated magnesium hydride material; and the obtained activated magnesium hydride material is mixed with the porous material, and ball milling or compression is carried out to obtain the composite hydrogen storage material. According to the material and the preparation method, nanoscale metal oxide particles are added and compounded with the porous material, so that the hydrogenation speed of magnesium-based composite powder in the hydrogen charging ball milling process can be increased, and meanwhile, the hydrogen storage material has good characteristics in the aspects of hydrogen adsorption and desorption kinetics in combination with the properties such as excellent pore channels and high surface area of the porous material.

Description

technical field [0001] The invention belongs to the technical field of hydrogen storage materials, and in particular relates to a metal oxide and porous material composite hydrogen storage material and a preparation method thereof. Background technique [0002] So far, the metal hydrogen storage materials that have been studied more mainly include: (1) LaNi 5 The rare earth system represented by AB 5 type alloy; (2) AB type hydrogen storage alloy represented by TiFe, (3) type ZrV 2 Department represented by AB 2 Type Laves phase hydrogen storage alloy; (4) LaNi 3 A new type of AB represented by 3 Type hydrogen storage alloy; (5) with Mg 2 A represented by Ni 2 Type B hydrogen storage alloy. Although LaNi 5 Type and LaNi 3 Type alloys have excellent hydrogen absorption and desorption kinetics and low hydrogen absorption and desorption temperature, but their hydrogen absorption weight is relatively low (only about 1.5%); TiFe series is 1.8-2.2wt%, and the activation p...

Claims

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Application Information

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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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