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Fuel cell proton exchange membrane and preparation method thereof

A technology for proton exchange membranes and fuel cells, applied in the field of proton exchange membranes, can solve the problems of decreased conductivity and poor mechanical properties of proton exchange membranes, and achieve the effects of reducing proton conductivity, improving mechanical strength, and reducing membrane poisoning effects

Pending Publication Date: 2022-07-29
江苏展鸣新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the object of the present invention is to provide a fuel cell proton exchange membrane and a preparation method thereof, which solves the technical problems of the existing proton exchange membranes with reduced electrical conductivity and poor mechanical properties at high temperatures

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A preparation method of a fuel cell proton exchange membrane, comprising the following steps:

[0033] (1) Preparation of carboxylated silica supported lanthanum oxide

[0034] Mix 0.45mol tetraethoxysilane and 0.045mol 2-cyanoethyltriethoxysilane uniformly to obtain a mixed solution;

[0035] Dissolve 0.11mol of cetyltrimethylammonium bromide template in 100mL of water, then add 20g, 26wt% ammonia solution to it, stir and mix evenly, then heat up to 60°C, add the resulting mixed solution to it, Continue to stir evenly, stand at 60°C for 18h, and then centrifuge to obtain the reaction product;

[0036] The obtained reaction product was washed, and then 100 mL, 45wt% sulfuric acid solution was added, and the reflux hydrolysis reaction was carried out at 80 ° C for 18 h, and then 50 mL, 1 mol / L lanthanum chloride solution was added to the reaction system, and the reaction was continued for 12 h. After the reaction is completed, the reaction product is centrifuged, washe...

Embodiment 2

[0043] A preparation method of a fuel cell proton exchange membrane, comprising the following steps:

[0044] (1) Preparation of carboxylated silica supported lanthanum oxide

[0045] Mixing 0.45mol tetraethoxysilane and 0.06mol 2-cyanoethyltriethoxysilane uniformly to obtain a mixed solution;

[0046] Dissolve 0.22mol of cetyltrimethylammonium bromide template in 100mL of water, then add 20g, 26wt% ammonia solution to it, stir and mix evenly, then heat up to 60°C, add the resulting mixed solution to it, Continue to stir evenly, stand at 60°C for 18h, and then centrifuge to obtain the reaction product;

[0047] The obtained reaction product was washed, then 100 mL, 45wt% sulfuric acid solution was added, and the reflux hydrolysis reaction was carried out at 90 ° C for 20 h, and then 60 mL, 1 mol / L lanthanum chloride solution was added to the reaction system, and the reaction was continued for 12 h. After the reaction is completed, the reaction product is centrifuged, washed, d...

Embodiment 3

[0054] A preparation method of a fuel cell proton exchange membrane, comprising the following steps:

[0055] (1) Preparation of carboxylated silica supported lanthanum oxide

[0056] Mixing 0.65mol tetraethoxysilane and 0.13mol 2-cyanoethyltriethoxysilane uniformly to obtain a mixed solution;

[0057] Dissolve 0.32mol of cetyltrimethylammonium bromide template in 100mL of water, then add 20g, 26wt% ammonia solution to it, stir and mix well, then heat up to 60°C, add the resulting mixed solution to it, Continue to stir evenly, stand at 60°C for 18h, and then centrifuge to obtain the reaction product;

[0058] The obtained reaction product was washed, and then 100 mL, 45wt% sulfuric acid solution was added, and the reflux hydrolysis reaction was carried out at 95 ° C for 20 h, and then 70 mL, 1 mol / L lanthanum chloride solution was added to the reaction system, and the reaction was continued for 12 h. After the reaction is completed, the reaction product is centrifuged, washe...

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PUM

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Abstract

The invention discloses a fuel cell proton exchange membrane and a preparation method thereof.The fuel cell proton exchange membrane is prepared from, by weight, 1-3 parts of carboxylated silicon dioxide loaded lanthanum oxide, 0.8-1.5 parts of modified graphene oxide, 1-1.5 parts of aminoimidazole ionic liquid and 8-10 parts of a perfluorosulfonic acid resin membrane, carboxylated silicon dioxide is introduced to load lanthanum oxide, silicon dioxide has a mesoporous structure and can provide a transmission channel for protons and improve the conduction performance of the protons, meanwhile, silicon dioxide is grafted with carboxyl groups, the content of bound water is increased, and the water retention capacity of the proton exchange membrane is improved; by utilizing the photoelectron effect and high activity of the rare earth element, the proton capture capability of the proton exchange membrane is enhanced, the membrane poisoning effect can be effectively reduced, and the service life of the proton exchange membrane is prolonged.

Description

Technical field [0001] The invention relates to the technical field of proton exchange membranes, and in particular to a fuel cell proton exchange membrane and a preparation method thereof. Background technique [0002] The proton exchange membrane is the core component of the all-vanadium redox flow battery and plays a key role in battery performance. It not only has a blocking effect, but also conducts protons. Currently, the most widely used proton exchange membrane at home and abroad is perfluorosulfonic acid protons. Exchange membranes, such as Dupont's Nafion membrane, Asahi Chemical's Aciplex membrane, Dow's Dow membrane, etc., are characterized by the excellent thermal and chemical stability of the fluorocarbon polymer backbone, which can ensure the stability of the proton membrane. It has a long service life, and the hydrophilic sulfonic acid group serves as a medium for adsorbing water, which can provide it with high conductivity. [0003] Although the perfluorosu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1048H01M8/1067H01M8/1072H01M8/18
CPCH01M8/1048H01M8/1067H01M8/1072H01M8/188
Inventor 杨凤娟卢柏林
Owner 江苏展鸣新能源有限公司
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