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Light metal borohydride/carbon loaded nanometer vanadium trioxide composite hydrogen storage material and preparation method thereof

A technology of borohydride and hydrogen storage materials, applied in chemical instruments and methods, non-metallic elements, hydrogen, etc., can solve the problem of reduced theoretical hydrogen storage capacity, achieve high porosity characteristics, facilitate dispersion, and high-efficiency catalysis Effect

Active Publication Date: 2020-05-12
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the bound body often occupies the bounded LiBH 4 Larger mass percentage of post-hydrogen storage system, usually higher than 50% by weight, thus reducing the theoretical hydrogen storage capacity of the system

Method used

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  • Light metal borohydride/carbon loaded nanometer vanadium trioxide composite hydrogen storage material and preparation method thereof
  • Light metal borohydride/carbon loaded nanometer vanadium trioxide composite hydrogen storage material and preparation method thereof
  • Light metal borohydride/carbon loaded nanometer vanadium trioxide composite hydrogen storage material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0061] The preparation method and parameters of the porous carbon were the same as those in Example 1 where the addition of tetraethyl orthosilicate was 14 mL. Mix the obtained porous carbon with NH at mass ratios of 1:3 and 1:5 4 VO 3 Mix, add nitric acid to adjust the pH of the solution to 2, hydrolyze at 180°C for 24 hours, and then calcinate in an argon atmosphere at 500°C for 2 hours to obtain porous carbon loaded with 30wt.% and 50wt.% nano V 2 o 3 of composite materials.

[0062] LiBH 4 Loadings of 30wt.% and 50wt.% nano V at a ratio of 60wt.% were obtained with 2 o 3 mixed with porous carbon, filled with hydrogen pressure at an initial pressure of 80bar, heated to 300°C, infiltrated for 30 minutes, cooled to room temperature, and formed LiBH 4 / 40wt% porous carbon loaded V 2 o 3 Composite hydrogen storage materials.

[0063] The hydrogen desorption performance of the material was tested by the volume hydrogen desorption method, and the initial vacuum degree wa...

Embodiment 3

[0065] The preparation of porous carbon with one-dimensional morphology is the same as that in Example 2. Mixing biphasic porous carbon and NH at a mass ratio of 1:4 4 VO 3 , adding nitric acid to adjust the pH of the solution to 2, and hydrolyzing at 180° C. for 24 hours. Then calcined at 500°C for 2 hours in an argon atmosphere to obtain a one-dimensional porous carbon-loaded 40wt.% nanometer V 2 o 3 composite material.

[0066] LiBH 4 With the ratio of 50wt.% and the obtained porous carbon supported nano V 2 o 3 Mixed, filled with hydrogen pressure at an initial pressure of 80bar, heated to 300°C for 30 minutes at a rate of 3°C / min and infiltrated for 30 minutes, and cooled to room temperature to obtain a composite hydrogen storage material.

[0067] The hydrogen desorption performance of the material was tested by the volume hydrogen desorption method, and the initial vacuum degree was 1×10 -3 Under the condition of Torr, hydrogen is released, heated to 450°C at a ...

Embodiment 4

[0069] One-dimensional porous carbon-supported nano V 2 o 3 The preparation of the composite material is the same as in Example 2. LiBH 4 With the ratio of 60wt.% and the obtained porous carbon supported nano V 2 o 3 Mixed, filled with hydrogen pressure at an initial pressure of 80 bar, heated to 300°C for infiltration for 30 minutes, and cooled to room temperature to obtain a composite hydrogen storage material. Figure 4 It is the X-ray diffraction pattern of the material, it can be seen from the figure that V 2 o 3 Sharp diffraction peaks, proving that V in porous carbon with one-dimensional morphology 2 o 3 The presence. One-dimensional porous carbon-supported nano V 2 o 3 N 2 (77K) adsorption-desorption curve and pore size distribution Figure 5 shown, which has a 2050cm 2 / g of the specific surface area and 1 ~ 5nm-based pore size. from Image 6 Shown (a) SEM morphology and (b) TEM morphology (c), and the SEM morphology of the material after five hydrogen ...

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Abstract

The invention discloses a light metal borohydride / carbon loaded nanometer V2O3 composite hydrogen storage material and a preparation method thereof. In the composite material, a carbon material is one-dimensional biphasic carbon formed by coating amorphous porous carbon out of a carbon nanotube; the light metal borohydride is at least one from the group consisting of lithium borohydride, calcium borohydride and magnesium borohydride, and is restrained in holes of the carbon material or is uniformly mixed with the carbon material and nanometer V2O3; and the nanometer V2O3 is loaded in the porechannels of the carbon material, on the surface of the carbon material and among carbon particles. The preparation method comprises the following steps: coating the outer surface of the carbon nanotube with phenolic resin dispersed with nanometer SiO2 particles, and then conducting heating, carbonizing and pickling to remove SiO2 in phenolic resin cracked carbon so as to obtain the carbon material; carrying out in-situ loading of the nanometer V2O3 in the pore channels of the carbon material, on the surfaces of the carbon material and among the carbon particles through cooperation with a hydrothermal reaction so as to obtain a carbon-loaded nanometer V2O3 composite material; and compounding the light metal borohydride and the carbon-loaded nanometer V2O3 composite material by adopting an infiltration method or a ball milling method.

Description

technical field [0001] The invention relates to the technical field of hydrogen storage materials, in particular to a light metal borohydride / carbon supported nano vanadium trioxide (V 2 o 3 ) composite hydrogen storage material and its preparation method. Background technique [0002] With the rapid development of the national economy and science and technology, the contradiction between the large demand for fossil fuel energy and the increasing scarcity of human beings has gradually become prominent. At the same time, the continuous increase of greenhouse gas emissions has put the ecological environment under the pressure of serious pollution. Therefore, it is extremely important to develop clean and renewable energy sources. As a secondary energy source, hydrogen energy has the advantages of abundant reserves, high energy density, high conversion efficiency, zero carbon emissions, and various utilization forms, and has become the main substitute for sustainable future e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/00
CPCC01B3/0078Y02E60/32
Inventor 高明霞沈艺潘洪革刘永锋
Owner ZHEJIANG UNIV
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