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Hydrogen storage material of coordinated alanate, and preparation method

A technology for hydrogen storage material and aluminum hydride, which is applied in the field of preparation of hydrogen storage material, can solve problems such as capacity loss and harm, and achieve the effects of reducing particles, avoiding impurity gas pollution, and reducing dispersed catalysts

Inactive Publication Date: 2007-10-10
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As for organic catalysts, in addition to causing capacity loss, there are also disadvantages of hydrocarbon gas pollutants endangering the application terminal of hydrogen storage systems - proton exchange membrane fuel cells

Method used

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  • Hydrogen storage material of coordinated alanate, and preparation method
  • Hydrogen storage material of coordinated alanate, and preparation method
  • Hydrogen storage material of coordinated alanate, and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Preparation of Ti-doped NaAlH with NaH and Al powders as matrix and Ti powder as dopant 4 Hydrogen storage material.

[0035] The raw materials used are: NaH (purity 95%, ~200 mesh), Al powder (purity greater than 99.95%, ~200 mesh), and Ti powder (purity 99.98%, ~325 mesh). Raw materials are used directly without treatment. In an argon atmosphere glove box, first put the raw material mixture in the molar ratio of NaH+0.04Ti into a stainless steel ball mill jar, and grind it on a Fritsch 7 planetary ball mill for 10 hours. The average catalyst grain size is about 500 nanometers. The ball milling atmosphere is high-purity hydrogen (purity 99.999%), and the initial pressure is about 8 atmospheres. The ball to material (mass) ratio is 40:1. Then open the stainless steel ball mill tank in the glove box, add Al powder (molar ratio NaH:Al=1:1) and ball mill for another 10 hours under the same conditions, the average particle size of the matrix material is less than 1 micro...

Embodiment 2

[0039]Preparation of Ti-doped NaAlH with NaH and Al powders as matrix and Ti powder as dopant 4 Hydrogen storage material.

[0040] The raw materials used are: NaH (purity 95%, ~200 mesh), Al powder (purity greater than 99.95%, ~200 mesh), and Ti powder (purity 99.98%, ~325 mesh). Raw materials are used directly without treatment. In an argon atmosphere glove box, first put the raw material mixture in the molar ratio of NaH+0.04Ti into a stainless steel ball mill jar, and grind it on a Fritsch 7 planetary ball mill for 10 hours. The average catalyst grain size is about 500 nanometers. The ball milling atmosphere is Ar atmosphere. The ball-to-material ratio is 40:1. Then open the stainless steel ball mill tank in the glove box, add Al powder (NaH:Al=1:1) and ball mill for another 10 hours under the same conditions, the average particle size of the matrix material is less than 1 micron.

[0041] In order to compare with the material prepared by the traditional direct synthes...

Embodiment 3

[0046] With NaH, Al powder as the matrix, TiH 2 Preparation of Ti-doped NaAlH as a dopant 4 Hydrogen storage material.

[0047] The raw materials used are: NaH (purity 95%, ~200 mesh), Al powder (purity greater than 99.95%, ~200 mesh), and TiH 2 powder (98% purity, ~325 mesh). Raw materials are used directly without treatment. Put molar ratio NaH+0.04TiH in the argon atmosphere glove box 2 The proportioned raw material mixture was put into a stainless steel ball mill jar, and ground on a Fritsch 7 planetary ball mill for 10 hours, and the average catalyst grain size was about 500 nanometers. The ball milling atmosphere is Ar atmosphere. The ball-to-material ratio is 40:1. Then open the stainless steel ball mill tank in the glove box, add Al powder (NaH:Al=1:1) and ball mill for another 10 hours under the same conditions, the average particle size of the matrix material is less than 1 micron.

[0048] The hydrogen absorption and desorption properties of the materials wer...

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Abstract

This invention provides a method for preparing transition metal doped coordinated aluminum hydride hydrogen-storage material. The hydrogen-storage material is composed of matrix material and catalyst. The method adopts selective multi-step synthesis strategy, which can increase the capacity as well as hydrogen absorption / desorption dynamics of the hydrogen-storage material. The method comprises: adopting transition metal powder, transition metal hydride or Ti-Al alloy as the catalyst during doping, and ball-milling in inert protective atmosphere or reactive hydrogen atmosphere. The method has such advantages as simple process, easy operation, and can largely increase the capacity as well as hydrogen absorption / desorption dynamics of the hydrogen-storage material. The prepared hydrogen-storage material has such advantages as high hydrogen storage capacity, high cyclic stability, appropriate operation temperature and no impurity gas pollution.

Description

Technical field [0001] The invention relates to a preparation technology of a hydrogen storage material, in particular to a transition metal-doped coordination aluminum hydride hydrogen storage material and a preparation method thereof. Background technique [0002] The development of high-performance hydrogen storage systems to provide hydrogen sources for application terminals is a key link in the application of hydrogen energy. Among various potential hydrogen storage methods, material hydrogen storage is significantly superior to high-pressure gaseous storage and low-temperature liquid storage in terms of safety and practicability, and is recognized as the most promising. Although traditional metal / alloy hydride systems and nanostructured carbon materials generally have the advantages of excellent kinetic properties and low operating temperature, their hydrogen storage capacity is low, which cannot meet the commercial needs of various application terminals, such as fuel ...

Claims

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Application Information

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IPC IPC(8): C01B6/24
Inventor 王平康向东成会明
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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