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A graphene aerogel modified proton exchange membrane for fuel cell and preparation method thereof

A graphene aerogel, proton exchange membrane technology, used in fuel cells, circuits, electrical components, etc., can solve problems such as low conductivity and poor stability, achieve excellent electrical conductivity, improve electrical conductivity, and inhibit swelling.

Inactive Publication Date: 2018-12-18
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Aiming at the defect that the perfluorosulfonic acid proton exchange membrane, which is currently widely used, has swelled in a high-temperature water-rich environment, and has poor stability and low conductivity, the present invention proposes a graphene airgel modified fuel cell proton exchange membrane and its preparation method, thereby effectively inhibiting the swelling of the perfluorosulfonic acid membrane layer when it absorbs water, improving the mechanical strength of the membrane material, and improving the stability and electrical conductivity of the membrane material

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  • A graphene aerogel modified proton exchange membrane for fuel cell and preparation method thereof

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Experimental program
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Embodiment 1

[0035] The preparation process is:

[0036](1) Evenly disperse graphite oxide in a mixed solution of ethanol and water to prepare a slurry, then add ethylenediamine, and heat up to react, and reduce and peel off graphite oxide through ethylenediamine to obtain graphene hydrogel Glue; in the mixed solution of ethanol and water, 1 weight part of ethanol, 99 weight parts of water; In the reaction system, 15 weight parts of graphite oxide, 80 weight parts of mixed solution, 5 weight parts of ethylenediamine; The temperature of reaction is 97 ℃, The reaction time is 8h;

[0037] (2) Dry the graphene hydrogel prepared in step (1) under freezing conditions, and use ammonia gas blowing to make the graphene gel evenly dispersed, inhibit the stacking and assembly of particles, and then filter to remove the solvent to obtain Granular graphene airgel; the average particle size of graphene airgel is 1.5μm, and the pore size is 30nm;

[0038] (3) Put the graphene airgel prepared in step (...

Embodiment 2

[0048] The preparation process is:

[0049] (1) Evenly disperse graphite oxide in a mixed solution of ethanol and water to prepare a slurry, then add ethylenediamine, and heat up to react, and reduce and peel off graphite oxide through ethylenediamine to obtain graphene hydrogel glue; in the mixed solution of ethanol and water, 2 parts by weight of ethanol, 98 parts by weight of water; in the reaction system, 13 parts by weight of graphite oxide, 82 parts by weight of mixed solution, and 5 parts by weight of ethylenediamine; the temperature of the reaction is 92 ° C, The reaction time is 9h;

[0050] (2) Dry the graphene hydrogel prepared in step (1) under freezing conditions, and use ammonia gas blowing to make the graphene gel evenly dispersed, inhibit the stacking and assembly of particles, and then filter to remove the solvent to obtain Granular graphene airgel; the average particle size of graphene airgel is 1.4μm, and the pore size is 10nm;

[0051] (3) Put the graphen...

Embodiment 3

[0061] The preparation process is:

[0062] (1) Evenly disperse graphite oxide in a mixed solution of ethanol and water to prepare a slurry, then add ethylenediamine, and heat up to react, and reduce and peel off graphite oxide through ethylenediamine to obtain graphene hydrogel Glue; in the mixed solution of ethanol and water, 1 weight part of ethanol, 99 weight parts of water; In the reaction system, 12 weight parts of graphite oxide, 84 weight parts of mixed solution, 4 weight parts of ethylenediamine; The temperature of reaction is 90 ℃, The reaction time is 9h;

[0063] (2) Dry the graphene hydrogel prepared in step (1) under freezing conditions, and use ammonia gas blowing to make the graphene gel evenly dispersed, inhibit the stacking and assembly of particles, and then filter to remove the solvent to obtain Granular graphene airgel; the average particle size of graphene airgel is 1.3μm, and the pore size is 2nm;

[0064] (3) Put the graphene airgel prepared in step (...

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Abstract

The invention provides a graphene aerogel modified fuel cell proton exchange membrane and a preparation method thereof. Dispersing graphite oxide uniformly in a mixed solution of ethanol and water, adding ethylenediamine to react to obtain graphene hydrogel, drying under freezing condition to obtain granular graphene aerogel, then dispersing in ethanol solution and coating on the surface layer ofsubstrate, then coating ethanol solution of perfluorosulfonic acid, drying and vacuum heat treating; The modified fuel cell proton exchange membrane is obtained by stripping and removing the substrate. As that graphene aerogel and the perfluorosulfonic acid resin are compound to form a sandwich structure, the swelling of the perfluorosulfonic acid membrane lay due to water absorption can be effectively restrained, the mechanical strength and stability of the membrane material can be improved, the conduction of moisture and the migration of hydrogen ion and protons of hydrate can be effectivelypromoted, and the electric conductivity of the membrane material can be improved.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to the preparation of proton exchange membranes, in particular to a graphene airgel modified fuel cell proton exchange membrane and a preparation method thereof. Background technique [0002] A fuel cell is a new type of device that directly converts the chemical energy of fuel and oxidant into electrical energy. Since the energy conversion is not limited by the Carnot cycle, and the additional product has no environmental pollution effect, it meets the development principle of developing new energy and reducing environmental pollution in modern society, so the research and application of fuel cells have attracted much attention. Among them, compared with other types of fuel cells, proton exchange membrane ignition cells have the characteristics of high energy conversion efficiency, no exhaust emissions, low temperature, and fast start-up, so they are recognized as the solution to the curr...

Claims

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Application Information

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IPC IPC(8): H01M8/1069H01M8/1053
CPCH01M8/1053H01M8/1069H01M2008/1095Y02E60/50
Inventor 陈庆廖健淞
Owner CHENDU NEW KELI CHEM SCI CO LTD
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