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A hydrogen storage material based on libh4 and its preparation method

A hydrogen storage material and ball milling technology are applied in the field of LiBH4-based hydrogen storage material and its preparation, which can solve the problems of expensive raw materials, lowering the hydrogen desorption temperature and high hydrogen desorption temperature of the hydrogen storage material, and achieve the effect of easy acquisition and low cost.

Active Publication Date: 2019-01-18
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a LiBH-based 4 Hydrogen storage material and preparation method thereof, by adding low-cost destabilizer, while maintaining LiBH 4 On the basis of the hydrogen desorption performance, further reduce the hydrogen desorption temperature of the hydrogen storage material

Method used

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  • A hydrogen storage material based on libh4 and its preparation method
  • A hydrogen storage material based on libh4 and its preparation method
  • A hydrogen storage material based on libh4 and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] wxya 4 -NH 4 PF 6 Preparation of hydrogen storage materials:

[0029] (1) Take 0.2184 g of LiBH 4 and 0.1816 g of NH 4 PF 6 mixed as a sample for use;

[0030] (2) Put the sample into a ball mill jar with 20 steel balls with a diameter of 10 mm (80 g in weight) and seal it. The weight ratio of the balls to the sample is 200:1;

[0031] (3) Put the ball mill jar into the ball mill for ball milling, use the mechanical ball milling method to mix evenly, under the condition of inert gas, set the ball milling speed to 200 rpm, and the ball milling time to 2 h;

[0032] (4) After ball milling, take out the obtained product in the glove box to obtain 9LiBH 4 -NH 4 PF 6 Hydrogen storage material.

Embodiment 2

[0034] wxya 4 -(NH 4 ) 2 SiF 6 Preparation of hydrogen storage materials:

[0035] (1) Take 0.2096 g of LiBH 4 and 0.1904 g of (NH 4 ) 2 SiF 6 mixed as a sample for use;

[0036](2) Put the sample into a ball mill jar with 20 steel balls with a diameter of 10 mm and seal it. The weight ratio of the balls to the sample is 200:1;

[0037] (3) Put the ball mill jar into the ball mill for ball milling, use the mechanical ball milling method to mix evenly, under the condition of inert gas, set the ball milling speed to 200 rpm, and the ball milling time to 2 h;

[0038] (4) After ball milling, take out the obtained product in the glove box to obtain 9LiBH 4 -(NH 4 ) 2 SiF 6 .

Embodiment 3

[0040] wxya 4 -(NH 4 ) 3 VF 6 Preparation of hydrogen storage materials.

[0041] (1) Take 0.1889 g of LiBH 4 and 0.2111 g of (NH 4 ) 3 VF 6 mixed as a sample for use;

[0042] (2) Put the sample into a ball mill jar with 20 steel balls with a diameter of 10 mm and seal it. The weight ratio of the balls to the sample is 200:1;

[0043] (3) Put the ball mill jar into the ball mill for ball milling, use the mechanical ball milling method to mix evenly, under the condition of inert gas, set the ball milling speed to 200 rpm, and the ball milling time to 2 h;

[0044] (4) After ball milling, take out the obtained product in the glove box to obtain 9LiBH 4 -(NH 4 ) 3 VF 6 .

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Abstract

The invention discloses a hydrogen storage material based on LiBH4 and a preparation method thereof; the hydrogen storage material is formed by ball milling of LiBH4 and (NH4)xMF6, wherein M of the (NH4)xMF6 is Al / Si / P / V. The preparation method comprises the steps: during preparation, according to the material ratio of (2-11) to 1, respectively weighing LiBH4 and (NH4)xMF6, and mixing as a sample for standby application; together putting the sample and grinding balls into a ball mill pot, and sealing, wherein the weight ratio of the grinding balls to the sample is (100-200) to 1, and the grinding balls are steel balls with the diameter of 10 mm; putting the ball mill pot into a ball mill, and carrying out ball milling with the ball milling time of 1-6 h and the ball milling rotating speed of 100-300 rpm; taking out the product obtained by ball milling, and thus obtaining the hydrogen storage material based on LiBH4. The hydrogen storage material not only maintains the high capacity hydrogen storage performance of LiBH4, but also obviously reduces the hydrogen release temperature; the used raw materials are low in cost and easy to obtain. Therefore, the hydrogen storage material based on LiBH4 has value in application.

Description

technical field [0001] The invention relates to a hydrogen storage material of a new energy material, specifically a LiBH-based 4 Hydrogen storage material and its preparation method. technical background [0002] Energy shortage and environmental pollution in the 21st century are major issues that endanger human existence. Hydrogen energy has the advantages of abundant reserves, renewable, high efficiency, and recyclable utilization. It is one of the most promising options to replace fossil fuels in the future energy system. Among them, hydrogen storage technology is the bottleneck of large-scale use of hydrogen energy. The technical goal of the on-board hydrogen storage system proposed by the U.S. Department of Energy (DOE) is to achieve a mass hydrogen storage density of 5.5 wt% and a mass hydrogen storage density of 40 g L by 2020. -1 volume hydrogen storage density. [0003] At present, hydrogen storage methods can be divided into high-pressure gaseous, low-temperatu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B3/00
CPCC01B3/0078C01P2002/72C01P2004/80Y02E60/32
Inventor 徐芬范明慧孙立贤于芳吴燚鹏邹勇进褚海亮
Owner GUILIN UNIV OF ELECTRONIC TECH
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