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A polyaniline pyrolysis product-libh4 hydrogen storage composite material and its preparation method

A technology of pyrolysis products and composite materials, applied in the field of materials, can solve the problems of unsatisfactory hydrogen absorption performance and reversibility of LiBH4, achieve low product cost, improve initial dehydrogenation temperature and hydrogen absorption and desorption rate, and simple preparation process Effect

Active Publication Date: 2017-10-20
中骅飞天(北京)企业管理咨询有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above patents are improving LiBH 4 Some effect has been achieved in hydrogen desorption performance, however, in improving the LiBH 4 Hydrogen absorption performance and reversibility are not satisfactory enough

Method used

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  • A polyaniline pyrolysis product-libh4 hydrogen storage composite material and its preparation method
  • A polyaniline pyrolysis product-libh4 hydrogen storage composite material and its preparation method
  • A polyaniline pyrolysis product-libh4 hydrogen storage composite material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Combining polyaniline pyrolysis products with LiBH 4 Mix uniformly in a mass ratio of 1:5 and place it in a ball mill. Under the protection of argon gas (99.99%, 1 atm), high-energy ball milling is carried out. Stainless steel balls are used, the ball-to-material ratio is 40:1, and the ball mill speed is 500r. / min, ball milling for 15 min, intermittent for 15 min, ball milling time for 5 h, after the ball milling is completed, it is naturally cooled to room temperature, taken out under the protection of argon, and sealed and packaged to obtain polyaniline pyrolysis product-LiBH 4 Hydrogen storage composites.

[0019] Hydrogen release performance test: Take 0.3 g of the hydrogen storage composite material prepared above and put it into a P-C-T (pressure-composition-temperature) tester for temperature programmed desorption (TPD) test. The test results are as follows figure 1 shown. Polyaniline pyrolysis product-LiBH 4 The initial dehydrogenation temperature of the hyd...

Embodiment 2

[0021] Combining polyaniline pyrolysis products with LiBH 4 Mix evenly in a mass ratio of 1:4 and place it in a ball mill. Under the protection of argon gas (99.99%, 1 atm), high-energy ball milling is carried out. Stainless steel balls are used, the ratio of ball to material is 20:1, and the speed of the ball mill is 300r / min, ball milling for 15 min, intermittent for 15 min, ball milling time is 4 h, after the ball milling is completed, it is naturally cooled to room temperature, taken out under the protection of argon, and sealed and packaged to obtain polyaniline pyrolysis product-LiBH 4 Hydrogen storage composites.

[0022] Cyclic hydrogen absorption / desorption performance test: take 0.3 g of the hydrogen storage composite material prepared above and put it into a sample tube for cyclic hydrogen absorption / desorption rate test. The test results are as follows figure 2 shown. The hydrogen storage composite achieved reversible hydrogen absorption and desorption at 400 °...

Embodiment 3

[0024] Combining polyaniline pyrolysis products with LiBH 4 Mix uniformly in a mass ratio of 1:2.5 and place it in a ball mill. Under the protection of argon gas (99.99%, 1 atm), high-energy ball milling is carried out. Stainless steel balls are used, the ball-to-material ratio is 10:1, and the speed of the ball mill is 500r / min, ball milling for 15 min, intermittent for 15 min, ball milling time is 3 h, after the ball milling is completed, it is naturally cooled to room temperature, taken out under the protection of argon, and sealed and packaged to obtain polyaniline pyrolysis product-LiBH 4 Hydrogen storage composites.

[0025] Hydrogen desorption performance test: 0.3 g of the hydrogen storage composite material prepared above was compressed and put into a sample tube for hydrogen desorption kinetics test. A hydrogen pressure of 3.0 MPa was given to suppress the hydrogen evolution of the sample before 400°C during the temperature rise. Test results such as image 3 sho...

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Abstract

A LiBH4-RPANI hydrogen storage composite material and a preparation method thereof are disclosed, the LiBH4-RPANI hydrogen storage composite material comprises polyaniline pyrolysis product (RPANI) and LiBH4 in the mass ratio of 1: 2 to 5; the preparation method of the hydrogen storage composite material is primarily as follows: polyaniline is put into a vacuum tube furnace with 1.0MPa high-purity hydrogen (99.99%) atmosphere for heating to 500 DEG C from room temperature in a heating rate of 5 DEG C / min, then constant temperature treatment for 12h, and then natural cooling to room temperature to obtain the polyaniline pyrolysis product, under argon atmosphere protection, ball milling of the polyaniline pyrolysis product and a LiBH4 hydrogen storage substrate is performed, the ratio of grinding media to material is 10 to 40: 1, the rotation speed is 200-500r / min, the ball milling is performed in the manner of ball milling for 15min and intermittent for 15min, the ball milling time is 1-5h, and after the ball milling time is completed, a mixture is naturally cooled to room temperature, then taken out, and packaged hermetically under the argon atmosphere protection to obtain the LiBH4-RPANI hydrogen storage composite material. The raw materials are easily obtained, cost is low, preparation process is simple, and industrial scale production is facilitated.

Description

Technical field: [0001] The invention belongs to the field of materials, in particular to a hydrogen storage composite material and a preparation method thereof. Background technique: [0002] Since the 21st century, due to the rapid development of fuel cells, the development and research of hydrogen energy have become increasingly important. However, the safe storage and transport of hydrogen has been a limiting factor for hydrogen energy applications. Due to the high hydrogen storage density per unit mass and per unit volume, light metal coordination hydride hydrogen storage materials have received special attention in on-board hydrogen storage batteries and are considered to be a kind of on-board hydrogen storage materials with great development potential. [0003] Among many light metal coordination hydrides, lithium borohydride (LiBH 4 ) with a mass hydrogen storage density of up to 18.5 wt.%. However, LiBH 4 The hydrogen release starts at a temperature higher than ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B3/00
CPCC01B3/0078Y02E60/32
Inventor 韩树民马雨飞赵鑫刘洋郭亮亮
Owner 中骅飞天(北京)企业管理咨询有限公司