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Method for preparing magnesium-silver hydrogen storage material

A hydrogen storage material, magnesium-silver technology, applied in the field of hydrogen storage materials, achieves the effects of fast hydrogen absorption and desorption, reduced consumption, and lower melting and annealing temperatures

Inactive Publication Date: 2013-04-03
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are no reports of this type of hydrogen storage alloy system at home and abroad.

Method used

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  • Method for preparing magnesium-silver hydrogen storage material
  • Method for preparing magnesium-silver hydrogen storage material
  • Method for preparing magnesium-silver hydrogen storage material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: Put a Mg block with a total weight of about 30 grams and a molar ratio of 4:1 (99% purity, add 8% more burn loss to the Mg block) and Ag sheet (99.5% purity) into a copper crucible , and then induction smelted twice under 15 KW power to obtain smelted Mg 4 Ag alloy, the alloy is annealed at 300 ℃ for 6 hours in a common vacuum annealing furnace, the alloy is composed of Mg 4 Ag, Mg 54 Ag 17 and a small amount of Mg heterogeneous composition (see figure 1 (a)). Use a grinder to remove the oxide skin on the surface of the annealed alloy, and then grind it into a 100-mesh alloy powder in a glove box, and add TiF to the alloy powder at 5wt.% of the magnesium-silver hydrogen storage material 3 (purity 99.9 wt.%) was ball milled for 30 h in a ball mill tank filled with 2 atm argon to obtain an amorphous alloy (see figure 1 (b)); where the ball-to-material ratio is 20:1, and the rotational speed of the ball mill is 300 rpm. The alloy po...

Embodiment 2

[0022] Example 2: Put a Mg block with a total weight of about 30 grams and a molar ratio of 3:1 (99% purity, add 8% more burning loss to the Mg block) and Ag flakes (99.5% purity) into a copper crucible , and then induction smelted twice under 15 KW power to obtain smelted Mg 3 Ag alloy, the alloy is annealed at 300 ℃ for 6 hours in a common vacuum annealing furnace, the alloy is composed of Mg 3 Ag and Mg 54 Ag 17 phase composition (see figure 1 (c)). Use a grinder to remove the oxide skin on the surface of the annealed alloy, and then grind it into a 100-mesh alloy powder in a glove box, and add TiF to the alloy powder at 5wt.% of the magnesium-silver hydrogen storage material 3 (Purity 99.9 wt.%) Amorphous alloy was obtained by ball milling in a ball mill tank filled with 2 atm argon for 30 h; the ball-to-material ratio was 20:1, and the ball mill speed was 300 rpm. The alloy powder after ball milling was found to have good hydrogen storage perfor...

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Abstract

The invention provides a method for preparing a magnesium-silver hydrogen storage material and belongs to the technical field of hydrogen storage materials. The method comprises the following steps of: performing induction smelting of a magnesium-silver alloy which contains 75 to 80 molar percent of Mg and the balance of Ag, wherein 8 to 10wt% of burning loss of Mg is increased during smelting; and annealing the smelted alloy for 6 hours at the temperature of 300 DEG C, grinding into 100 meshes powder in a glove box, adding 5wt% of TiF3 into the powder, performing ball milling for 30 hours in a ball milling tank, thus obtaining the magnesium-silver hydrogen storage material. The method has the advantages that the raw materials and energy consumption are reduced, the preparation process is simple and consumes short time, the method is easy to control and the like; and the magnesium-silver hydrogen storage material prepared by the method has the characteristics of high hydrogen storage quantity, high hydrogen absorption and release rate, high cycle stability and the like.

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 magnesium-silver hydrogen storage material. Background technique [0002] Hydrogen storage materials are substances that can reversibly absorb, store and release a large amount of hydrogen gas at a certain temperature and hydrogen pressure. They have the characteristics of large hydrogen storage capacity, no pollution, safety, reliability, and reusability. There are many kinds of hydrogen storage materials, among which hydrogen storage alloys have become the most widely used hydrogen storage materials due to the maturity of preparation technology and process. In metals and alloys, elemental Mg has a high hydrogen storage capacity, and its hydride MgH 2 The hydrogen storage capacity reaches 7.6 wt.%, and has the advantages of abundant resources, low price, and light weight. Therefore, Mg and Mg-based alloys are consider...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C5/06C22C23/00C22C30/00C22F1/06C22F1/14C22F1/00C22F1/02B22F9/04
Inventor 斯廷智张江波柳东明张庆安
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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