Magnesium hydride (MgH2) and ferrum-containing sulfide composite hydrogen storage material and preparation method thereof

A composite material and sulfide technology, applied in the field of hydrogen storage materials, can solve the problems of insignificant improvement in dehydrogenation temperature, high price, and restrictions, and achieve the effects of easy industrialization and promotion, low cost, and low energy consumption

Inactive Publication Date: 2015-03-25
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Documents I.E.Malka, M.Pisarek, T.Czujko, J.Bystrzycki.Journal of Hydrogen Energy.36(2011) 12909-12917 proposed that MgH 2 Adding a series of transition metal halides in the alloy, the hydrogen absorption and desorption rate of the alloy obtained by ball milling has been improved, but the dehydrogenation temperature is not significantly improved. At the same time, some transition metal halides such as NbF 5 The price is relatively expensive, which limits its practicality

Method used

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  • Magnesium hydride (MgH2) and ferrum-containing sulfide composite hydrogen storage material and preparation method thereof
  • Magnesium hydride (MgH2) and ferrum-containing sulfide composite hydrogen storage material and preparation method thereof
  • Magnesium hydride (MgH2) and ferrum-containing sulfide composite hydrogen storage material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] In an argon-protected glove box, the MgH 2 Powder and Fe 3 S 4 The powder is mixed in a ball mill at a mass ratio of 4:1. The balls are stainless steel. The ball mill is a Pulverisette 6 planetary ball mill. The speed of the ball mill is 450r / min. The time was 2h, then filled with high-purity argon gas of 0.1MPa, and adopted high-energy ball milling. MgH prepared by ball milling 2 The composite hydrogen storage material was tested for hydrogen absorption rate, and the results were as follows figure 1 shown. From the hydrogen absorption rate curve at 423K in the figure, it can be seen that the MgH 2 add Fe 3 S 4 The composite hydrogen storage material prepared after ball milling can reach 80% of the maximum hydrogen absorption in 30s, and in about 25min, the hydrogen absorption is 3.5 times that of the alloy without additives, but without Fe. 3 S 4 MgH 2 It takes 900s for the sample to reach 80% of the maximum hydrogen absorption capacity. It can be seen that ...

Embodiment 2

[0025] In an argon-protected glove box, the MgH 2 Powder and Fe 3 S 4 The powder is mixed in a ball mill at a mass ratio of 9:1. The balls are stainless steel. The ball mill is a Pulverisette 6 planetary ball mill. The speed of the ball mill is 550r / min. The time was 3h, then filled with high-purity argon gas of 0.5MPa, and adopted high-energy ball milling. MgH prepared by ball milling 2 The composite hydrogen storage material was tested for hydrogen absorption rate, and the results were as follows figure 2 shown. From the hydrogen absorption rate curve at 473K in the figure, it can be seen that the MgH 2 add Fe 3 S 4 The composite hydrogen storage material prepared after ball milling can reach 80% of the maximum hydrogen absorption capacity within 30 s without adding Fe. 3 S 4 MgH 2 It takes 900s for the sample to reach 80% of the maximum hydrogen absorption capacity. It can be seen that the iron-containing sulfide and MgH provided by the present invention 2 The ...

Embodiment 3

[0027] In an argon-protected glove box, the MgH 2 Powder and Fe 3 S 4 The powder is mixed in a ball mill at a mass ratio of 7:3. The balls are stainless steel. The ball mill is a Pulverisette 6 planetary ball mill. The speed of the ball mill is 550r / min. The time was 3h, then filled with high-purity argon gas of 0.1MPa, adopted high-energy ball milling method, cooled to room temperature naturally after the ball milling, and packaged in a glove box protected by argon gas. MgH prepared by ball milling 2 The hydrogen desorption rate test was carried out on the composite hydrogen storage material, and the results were as follows image 3shown. From the hydrogen evolution rate curve at 573K in the figure, it can be seen that the direction of MgH 2 add Fe 3 S 4 The composite hydrogen storage material prepared after ball milling can reach 80% of the maximum hydrogen release in 200s without adding Fe. 3 S 4 MgH 2 It takes 1000s to reach 80% of the maximum hydrogen release. ...

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Abstract

The invention discloses a magnesium hydride (MgH2) and ferrum-containing sulfide composite hydrogen storage material and a preparation method thereof. The composite hydrogen storage material comprises MgH2 and 10-30 wt% of ferrum-containing sulfide, wherein the ferrum-containing sulfide is Fe3S4 or FeS or FeS2. The method comprises the following steps of: adding the ferrum-containing sulfide which serves as an additive into MgH2, and carrying out ball milling at the pressure of 0.1-0.5MPa in the atmosphere of high-purity argon to prepare the composite hydrogen storage material. The hydrogen absorption and desorption rate of the MgH2 and ferrum-containing sulfide composite hydrogen storage material is over 2 times higher that that of the MgH2 hydrogen storage material which contains no ferrum-containing sulfide. The MgH2 and ferrum-containing sulfide composite hydrogen storage material is simple in preparation process, has stable performances and can be used for storing hydrogen in the field of fuel cells.

Description

technical field [0001] The invention relates to a magnesium metal hydride iron-containing sulfide composite hydrogen storage material and a preparation method, and belongs to the technical field of hydrogen storage materials. Background technique [0002] With the development of society, hydrogen energy, as a new type of energy, has received extensive attention. The use of hydrogen storage materials to store hydrogen is considered to be safe and efficient. At present, Mg / MgH is ideal. 2 Although the system has high hydrogen storage capacity and low cost, its kinetic performance is poor, and the requirements for hydrogen absorption and desorption conditions are relatively high, which hinders its practical application. [0003] In recent years, many researchers have used MgH 2 Additives are added to improve the hydrogen absorption / desorption properties of magnesium hydrogen storage materials. The product mentioned in the patent application with application number 2012100456...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B3/06
CPCY02E60/362Y02E60/36
Inventor 韩树民程颖张伟赵鑫李靖
Owner YANSHAN UNIV
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