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Magnesium-base nano hydrogen-storage material and preparing method thereof

A technology for hydrogen storage materials and nanocrystals, which is applied in the field of magnesium-based nano-hydrogen storage materials and its preparation, can solve the problems of unfavorable large-scale practical application of magnesium-based hydrogen storage materials, high nickel and rare earth content, and high material cost, and achieve good results. Hydrogen absorption and desorption kinetics, high hydrogen storage capacity, and the effect of high hydrogen storage capacity

Active Publication Date: 2011-02-02
JIANGSU JICUI ANTAI CHUANGMING ADVANCED ENERGY MATERIALS RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the above two literatures, the content of nickel and rare earth in the alloy composition is high, thus resulting in high material cost, which is unfavorable for the large-scale practical application of magnesium-based hydrogen storage materials

Method used

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  • Magnesium-base nano hydrogen-storage material and preparing method thereof
  • Magnesium-base nano hydrogen-storage material and preparing method thereof
  • Magnesium-base nano hydrogen-storage material and preparing method thereof

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preparation example Construction

[0038] The invention provides a preparation method of the magnesium-based hydrogen storage material, the method comprising the steps of:

[0039] 1) Prepare a master alloy from raw materials, the composition of the obtained master alloy includes 15-25% by weight of nickel, 5-15% by weight of rare earth elements containing cerium and the balance of magnesium;

[0040] 2) Melting the obtained master alloy in the warehouse, and adopting a rapid solidification process, forming the melted master alloy into the magnesium-based hydrogen storage material; wherein, the inert gas atmosphere controls the temperature in the warehouse before and after the master alloy is melted. The pressure is such that the pressure in the chamber before the master alloy is melted is 350-500mbar, and the pressure in the chamber after the master alloy is melted is 150-350mbar.

[0041] The invention is not limited by any particular theory. However, oxidation can be prevented by passing an inert gas during...

Embodiment 1

[0053] material preparation

[0054] The raw material ratio (percentage by weight) of the master alloy of embodiment 1 is

[0055] Magnesium with 99.98% purity: 72%

[0056] 99.98% pure nickel: 20%

[0057] Rare earth elements containing cerium with a purity of 99.7%: 8%

[0058] The master alloy is prepared by vacuum induction melting magnesium, nickel and cerium-containing rare earth elements according to the above ratio. Then, under the conditions of copper cooling disc and 10.5 m / s (m / s) disc rotation speed, rapid solidification is carried out under the protective atmosphere of argon, so as to obtain the material of Example 1. Wherein, the atmosphere pressure is controlled at 400mbar before the master alloy is melted, and the atmosphere pressure is controlled at 200mbar after melting. The resulting material is a strip-shaped magnesium-based hydrogen storage alloy consisting essentially of nanocrystals with a grain size of about 10 nm.

[0059] Material Characteriz...

Embodiment 2

[0063] material preparation

[0064] The raw material ratio (percentage by weight) of the master alloy of embodiment 2 is

[0065] Magnesium with 99.98% purity: 72%

[0066] 99.98% pure nickel: 22%

[0067] Rare earth elements containing cerium with a purity of 99.7%: 6%

[0068] The master alloy is prepared by vacuum induction melting magnesium, nickel and cerium-containing rare earth elements according to the above ratio. Then, rapid solidification was carried out under the conditions of copper cooling disc and 15 meters / second (m / s) disc rotation speed under the protective atmosphere of argon, so as to obtain the material of Example 2. Wherein, the atmosphere pressure is controlled at 400mbar before the master alloy is melted, and the atmosphere pressure is controlled at 200mbar after melting. The resulting material is a strip-shaped magnesium-based hydrogen storage alloy consisting essentially of nanocrystals with a grain size of about 10 nm.

[0069] Material Cha...

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Abstract

The invention relates to an mg-based hydrogen storage material, which comprises15 to 25 weight percent of nickel, and 5 to 15 weight percent of cerium contained rare earth elements, the rest is magnesium. The material mainly consists of nano-crystalline; in the nano-crystalline, the grain size of more than 70 percent of crystalline is lower than 10 nm. The invention further relates to a manufacture method of the material.

Description

technical field [0001] The invention relates to a magnesium-based nano hydrogen storage material and a preparation method thereof. More specifically, the present invention relates to a high-capacity magnesium-based nano hydrogen storage material with uniform grain size and a preparation method thereof. Background technique [0002] The energy crisis that broke out in the second half of the 20th century not only brought about the rapid development of energy materials, but also made the development and application of hydrogen storage materials an emerging topic. Hydrogen energy has attracted much attention as a clean secondary energy source, and has become an ideal green new energy source to solve the environmental pollution problems caused by traditional fuels. Hydrogen production, hydrogen storage and hydrogen transportation are the main issues restricting the development of hydrogen energy. Hydrogen storage technology is the key to the practical and large-scale utilization...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/00C22C1/03
Inventor 武英简・科特尔・苏贝格沃特梅尔・亚特斯韩伟周少雄
Owner JIANGSU JICUI ANTAI CHUANGMING ADVANCED ENERGY MATERIALS RES INST CO LTD
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