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Amorphous magnesium-yttrium-transition metal hydrogen storage material and preparation method thereof

A technology of transition metals and hydrogen storage materials, which is applied in the field of hydrogen storage materials, and achieves the effects of simple preparation process, reduced cost and low cost

Inactive Publication Date: 2010-10-13
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the existing hydrogen storage material system and preparation technical problems, the present invention provides an amorphous magnesium-yttrium-transition metal (Co, Ni, Cu) hydrogen storage material and a preparation method thereof

Method used

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  • Amorphous magnesium-yttrium-transition metal hydrogen storage material and preparation method thereof
  • Amorphous magnesium-yttrium-transition metal hydrogen storage material and preparation method thereof
  • Amorphous magnesium-yttrium-transition metal hydrogen storage material and preparation method thereof

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Effect test

Embodiment 1

[0021] The metal Y block has a purity of 99.5%; the metal Ni sheet has a purity of 99.9%. According to the YNi alloy molar ratio of 1:1, a certain amount of raw metal (2wt.% burning loss is added to Y) was weighed and smelted under a power of 15KW to obtain a YNi master alloy. by Mg 12 The molar ratio of Mg and YNi in the YNi alloy is 12: 1. Weigh a certain amount of metal Mg block (purity 99.7%) and YNi master alloy (18wt.% burning loss is added to Mg), and then in ZK-10TIII protected by argon Remelting and rapid quenching in a vacuum single-roll melt quenching furnace. The surface speed of the copper roll is 40m / s to obtain amorphous Mg with a width of 3mm and a thickness of 30-50μm 12 YNi alloy strip ( figure 1 (a) Amorphous Mg 12 X-ray diffraction pattern of YNi alloy sample). Amorphous Mg 12 The YNi alloy strip was ground into a 300-mesh powder in a glove box and found to have good hydrogen storage performance ( figure 2 Amorphous Mg 12 Hydrogen absorption and de...

Embodiment 2

[0023] Same as in Example 1, first prepare a YNi master alloy. by Mg 11 Y 2 Ni 2 The molar ratio of Mg and YNi in the alloy is 11:2. Weigh a certain amount of metal Mg block and YNi master alloy (18wt.% burning loss is added to Mg), and then melt it quickly in the ZK-10TIII type vacuum single roll protected by argon. Re-dissolved and rapidly quenched in a quenching furnace. The surface speed of the copper roller is 30m / s to obtain amorphous Mg with a width of 3mm and a thickness of 30-50μm 11 Y 2 Ni 2 Alloy strip ( figure 1 (b) Amorphous Mg 11 Y 2 Ni 2 X-ray diffraction patterns of alloy samples). Amorphous Mg 12 YNi alloy strips were ground into 300-mesh powder in a glove box, and the hydrogen storage properties were tested as follows: the hydrogen absorption and desorption capacities reached 5.1 and 4.3wt.% respectively; the hydrogen absorption and desorption temperatures were respectively lower than those of pure Mg by 277 and 77K; The hydrogen speed is greatly ...

Embodiment 3

[0025] In the same manner as in Example 1, a YCu master alloy (the purity of metal Cu flakes is 99.7%) was first prepared. by Mg 10 The molar ratio of Mg and YCu in the YCu alloy is 10: 1. Weigh a certain amount of metal Mg block and YCu master alloy (18wt.% burning loss is added to Mg), and then melt them in the ZK-10TIII type vacuum single-roller protected by argon. Redissolved and quenched in a rapid quenching furnace. The surface speed of the copper roller is 35m / s to obtain amorphous Mg with a width of 3mm and a thickness of 30-50μm 10 YCu alloy thin strip ( figure 1 (c) Amorphous Mg 10 X-ray diffraction pattern of YCu alloy sample). Amorphous Mg 10 YCu alloy thin strips were ground into 300-mesh powder in a glove box, and the hydrogen storage properties were tested as follows: the hydrogen absorption and desorption capacities reached 5.2 and 4.5wt.% respectively; The hydrogen speed is greatly improved, and when it is higher than 373K, it can absorb hydrogen and abs...

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Abstract

The invention provides an amorphous magnesium-yttrium-transition metal hydrogen storage material and a preparation method thereof, belonging to the technical field of hydrogen storage materials. The content of Mg in the hydrogen storage material is 70-90at.%, the transition metal is Co, Ni and Cu, and the yttrium and the transition metal are added in a combined addition manner based on the mol ratio of 1 to 1. The preparation method comprises the steps of: firstly, melting and preparing intermediate alloy of the yttrium and the transition metal by using an induction melting furnace; secondly, remelting and rapidly quenching the metal Mg and the intermediate alloy of the yttrium and the transition metal in a vacuum single-roller liquor rapid quenching furnace, wherein the prepared material is an amorphous ribbon with the width of 3mm and the thickness of 30-50 microns; and grinding the prepared amorphous ribbon into powder with different granularities in a glove box, wherein the amorphous ribbon or powder is the finished products of hydrogen storage materials. In the invention, the provided hydrogen storage material overcomes the disadvantage of low hydrogen storage amount; the combined addition of the Y and the transition metal facilitates the formation of the amorphous body and improves the hydrogen storage performance of the material. In addition, the invention has the characteristics of simple preparation method and low cost.

Description

technical field [0001] The invention belongs to the technical field of hydrogen storage materials, and in particular relates to an amorphous magnesium-yttrium-transition metal hydrogen storage material and a preparation method thereof. Background technique [0002] Among all metals and alloys, elemental Mg has the highest hydrogen storage capacity, and its hydride MgH 2 The hydrogen storage capacity reaches 7.6wt.%, and has the advantages of abundant resources, low price, and light weight. Therefore, Mg and Mg-based alloys are considered to be the most promising hydrogen storage materials for fuel vehicles and the like. However, Mg and Mg-based hydrogen storage alloys still have a certain distance from practical application. This is mainly because: (1) this type of alloy is a medium-temperature alloy, and usually needs to be around 600K to effectively absorb and desorb hydrogen; (2) the speed of hydrogen absorption and desorption is relatively slow, that is, the kinetic pe...

Claims

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Application Information

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IPC IPC(8): C22C45/00
Inventor 张庆安斯庭智柳东明刘寅峰
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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