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Preparation method of organic-inorganic composite proton exchange membrane for fuel cell

A proton exchange membrane and inorganic composite technology, which is applied to fuel cell components, fuel cells, solid electrolyte fuel cells, etc., can solve the problem that the comprehensive performance of the composite membrane cannot meet the actual needs, the damage of the carbon tube structure is large, and it is not easy to control, etc. problems, achieve excellent water absorption and water retention properties, increase alcohol resistance, and improve mechanical properties

Active Publication Date: 2013-09-11
HUBEI ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Obviously, this series of chemical treatment processes is too time-consuming and difficult to control, and the structural damage to the carbon tubes is relatively large, so the comprehensive performance of the composite film is still difficult to meet the actual needs.

Method used

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  • Preparation method of organic-inorganic composite proton exchange membrane for fuel cell
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  • Preparation method of organic-inorganic composite proton exchange membrane for fuel cell

Examples

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Effect test

Embodiment 1

[0036] A preparation method of an organic-inorganic composite proton exchange membrane for a fuel cell, the steps are as follows:

[0037] Put 1g of carbon nanotubes in 50mL of 30wt% hydrogen peroxide, stir and oxidize at room temperature for 3 hours, then filter, wash the solid repeatedly with deionized water until the filtrate pH=7, and dry in vacuum at 60°C for 24 hours to obtain oxidized carbon nanotubes . Take 0.8g of oxidized carbon nanotubes and disperse them in a mixed solution consisting of 12.6mL of tetraethyl orthosilicate and 167mL of absolute ethanol, add dropwise an ammonia solution containing 67mL of water at pH=8.5, after the dropwise addition, continue to Stir for 10 hours, filter, wash repeatedly with deionized water until the filtrate pH=7, filter with suction, and dry to obtain carbon nanotubes coated with silicon dioxide (transmission electron microscope as shown in figure 1 As shown, the scanning electron microscope image is shown in figure 2 shown). ...

Embodiment 2

[0051] A preparation method of an organic-inorganic composite proton exchange membrane for a fuel cell, the steps are as follows:

[0052] Put 1g of carbon nanotubes in 75mL of 30wt% hydrogen peroxide, stir and oxidize at 50°C for 3 hours, cool to room temperature, filter, wash the solid repeatedly with deionized water until the filtrate pH=7, and dry in vacuum at 60°C for 24 hours to obtain the oxidation processed carbon nanotubes. Disperse 0.8g of oxidized carbon nanotubes in a mixed solution consisting of 10mL of tetraethyl orthosilicate and 150mL of absolute ethanol, add dropwise an ammonia solution containing 60mL of water at pH=9, after the dropwise addition, continue to stir at room temperature After 8 hours, filter, wash repeatedly with deionized water until the pH of the filtrate is 7, filter with suction, and dry to obtain carbon nanotubes coated with silicon dioxide. Disperse 0.5 g of silica-coated carbon nanotubes in 35 mL of isopropanol, and ultrasonically vibrat...

Embodiment 3

[0054] A preparation method of an organic-inorganic composite proton exchange membrane for a fuel cell, the steps are as follows:

[0055] Put 1g of carbon nanotubes in a mixture of 25mL65wt% concentrated nitric acid and 75mL98wt% concentrated sulfuric acid, stir and oxidize at 60°C for 8 hours, cool to room temperature, filter, and wash the solid repeatedly with deionized water until the pH of the filtrate=7 , 60 ° C vacuum drying for 24 hours to obtain oxidized carbon nanotubes. Disperse 0.8 g of oxidized carbon nanotubes in a mixed solution consisting of 8 mL of tetraethyl orthosilicate and 60 mL of absolute ethanol, add dropwise a pH=3 hydrochloric acid solution containing 56 mL of water, and continue stirring at room temperature after the dropwise addition After 6 hours, filter, wash repeatedly with deionized water until the filtrate pH=7, filter with suction, and dry to obtain carbon nanotubes coated with silicon dioxide. Disperse 0.5g of silica-coated carbon nanotubes ...

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Abstract

The invention belongs to the technical field of fuel cells, and in particular discloses a preparation method of an organic-inorganic composite proton exchange membrane for a fuel cell. The preparation method comprises the following steps of: oxidating a carbon nano tube first, then preparing the carbon nano tube coated by silicon dioxide by using a sol-gel method, and mixing dispersion liquid of the carbon nano tube coated by silicon dioxide with dispersion liquid of sulfonated polymers to prepare a solution casting membrane. The prepared composite proton exchange membrane has high water-absorbing performance and high alcohol resistant performance.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a method for preparing an organic-inorganic composite proton exchange membrane for a fuel cell. The prepared composite proton exchange membrane has high water absorption and high alcohol resistance properties. Background technique [0002] A fuel cell is a device that directly converts chemical energy stored in fuel and oxidant into electrical energy through electrode reactions rather than combustion. The biggest feature of this device is that since the reaction process does not involve combustion, its energy conversion efficiency is not limited by the "Carnot cycle". Times; environmentally friendly, almost no nitrogen oxides and sulfur oxides; carbon dioxide emissions are more than 40% less than conventional power plants. It is precisely because of these outstanding advantages that the research and development of fuel cell technology has attracted the attention of government...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M8/10H01M8/1016H01M8/1069
CPCY02E60/50
Inventor 龚春丽文胜耿青夏玥陈尚月朱柳奇刘海郑根稳
Owner HUBEI ENG UNIV
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