Magnesium, aluminum, boron and nickel-based hydrogen storage material and preparing method thereof

A hydrogen storage material, nickel-based technology, applied in the field of hydrogen storage materials and its preparation, can solve the problems of many raw materials and high cost, and achieve the effects of large hydrogen storage capacity, short production cycle, and good hydrogen absorption and desorption kinetics

Inactive Publication Date: 2016-01-27
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the preparation process of the alloy prepared by this method is simple, easy to control, and high in capacity, it is expensive and has many raw materials.

Method used

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  • Magnesium, aluminum, boron and nickel-based hydrogen storage material and preparing method thereof
  • Magnesium, aluminum, boron and nickel-based hydrogen storage material and preparing method thereof
  • Magnesium, aluminum, boron and nickel-based hydrogen storage material and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Take 2.96g of Mg powder, 0.2g of Al powder, 0.04g of B powder and 0.8g of Ni powder and mix evenly, press it into a cylinder with a diameter of 10mm and a height of 8mm, wrap it with tantalum, and then use a six-sided top press to keep the temperature at 4GPa and 1200℃. After pressing for 30 minutes, the alloy was rapidly cooled with liquid nitrogen immediately to obtain a magnesium-aluminum-boron-nickel-based hydrogen storage material. Such as figure 1 As shown, it can be seen that there are a large number of abundant secondary dendrites in the sample, which provide more channels for the diffusion of hydrogen atoms.

Embodiment 2

[0022] Take 3.44g of Mg powder, 0.12g of Al powder, 0.04g of B powder and 0.4g of Ni powder and mix them evenly, press them into a cylinder with a diameter of 10mm and a height of 8mm, wrap it with tantalum, and then use a six-sided top press to keep warm at 6GPa and 1800°C. After pressing for 60 minutes, the alloy was rapidly cooled with liquid nitrogen immediately to obtain a magnesium-aluminum-boron-nickel-based hydrogen storage material. Such as figure 2 As shown, it can be seen that the composition of the sample is Mg 6 Ni+Mg phase.

Embodiment 3

[0024] Take 3.74g of Mg powder, 0.04g of Al powder, 0.02g of B powder and 0.2g of Ni powder and mix them evenly, press them into a cylinder with a diameter of 10mm and a height of 8mm, wrap it with tantalum, and then use a six-sided top press to keep it warm at 4GPa and 1400°C. After pressing for 45 minutes, the alloy was rapidly cooled with liquid nitrogen immediately to obtain a magnesium-aluminum-boron-nickel-based hydrogen storage material. Such as image 3 As shown, it can be seen that the amount of hydrogen absorbed by the sample reaches 3.8% after 3000S at 300°C, as Figure 4 As shown, the hydrogen desorption kinetics of the sample at 300 °C within 300 S can be seen.

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Abstract

The invention discloses a magnesium, aluminum, boron and nickel-based hydrogen storage material. The chemical component of the magnesium, aluminum, boron and nickel-based hydrogen storage material is xAl-yB-zNi-(1-x-y-z)Mg, wherein the mass fraction, by weight, of x is larger than or equal to 1% and smaller than or equal to 5%, the mass fraction, by weight, of y is larger than or equal to 0.5% and smaller than or equal to 1%, and the mass fraction, by weight, of z is larger than or equal to 5% and smaller than or equal to 20%. A preparing method for the hydrogen storage material comprises the steps that magnesium powder, nickel powder, boron powder and aluminum powder are evenly mixed according to the composition and pressed into a cylinder with the diameter of 10 mm and the height of 8 mm; and then a cubic press is used for heat preservation and pressure maintaining for 30-60 min at 4-6 GPa and 1200-1800 DEG C; and liquid nitrogen is immediately used for cooling an alloy, and the magnesium, aluminum, boron and nickel-based hydrogen storage material is obtained. The preparing method is simple and short in production period, and the prepared hydrogen storage alloy has the good performance of being short in activation period, high in hydrogen absorbing and desorbing rate and the like.

Description

technical field [0001] The invention relates to a hydrogen storage material and a preparation method thereof. Background technique [0002] The burning of traditional fossil fuels has led to increasing environmental problems, and the development of new pollution-free energy has become an urgent need. Hydrogen energy has many advantages such as cleanness, high energy, and no secondary pollution. Therefore, the development of hydrogen energy has aroused great interest. Magnesium-based hydrogen storage alloy is a promising hydrogen storage material, which has a low density (1.74g / cm 3 ), high capacity (7.6wt.%), abundant resources, low price and so on. However, the hydrogen absorption / desorption conditions of magnesium are often relatively harsh, needing to reach above 300 degrees, the kinetics are relatively slow, and the activation is difficult. [0003] The Chinese invention patent application with the application number of 201410841643.9 discloses a preparation method of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/00C22C1/04
Inventor 彭秋明吴文涛张志伟刘洋
Owner YANSHAN UNIV
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