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A heat-resistant proton exchange membrane for fuel cell and a preparation method thereof

A proton exchange membrane and fuel cell technology, applied in fuel cells, circuits, electrical components, etc., can solve the problems of phosphoric acid loss, conductivity drop, etc.

Inactive Publication Date: 2018-12-21
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] In order to effectively solve the above-mentioned technical problems, the present invention proposes a heat-resistant fuel cell proton exchange membrane and its preparation method, which can effectively solve the problem of the decrease in electrical conductivity caused by the loss of phosphoric acid in the membrane at high temperature, and improve the high temperature of the membrane. tolerance

Method used

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  • A heat-resistant proton exchange membrane for fuel cell and a preparation method thereof

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Effect test

Embodiment 1

[0030] a. Dissolve organic substance A in an organic solvent, add insoluble inorganic salt B and disperse, adjust the pH to acidic and completely dissolve inorganic salt B, add additives, raise the temperature to 270°C for 4 hours, add oxidant and stir after the reaction is completed, and obtain A solution of modified organic-metal ion ligands, in which the metal ions are uniformly distributed inside the organic phase;

[0031] b. Centrifuge the solution prepared in step a, wash the centrifuge repeatedly with deionized water, then add it to an aqueous phosphoric acid solution with a mass concentration of 46%, heat at 190°C to completely evaporate the solvent, and obtain an improved phosphoric acid-doped solution. Colloidal solid material with organic phase loaded with inorganic salt;

[0032] c. The colloidal solid material obtained in step b is formed by pressing, the surface is treated with acid resistance, and dried and solidified in vacuum to obtain a heat-resistant fuel c...

Embodiment 2

[0036] a. Dissolve organic substance A in an organic solvent, add insoluble inorganic salt B and disperse, adjust the pH to acidic and completely dissolve inorganic salt B, add additives, raise the temperature to 270°C for 4 hours, add oxidant and stir after the reaction is completed, and obtain A solution of modified organic-metal ion ligands, in which the metal ions are uniformly distributed inside the organic phase;

[0037] b. Centrifuge the solution prepared in step a, wash the centrifuge repeatedly with deionized water, then add it to an aqueous phosphoric acid solution with a mass concentration of 40%, and heat at 170°C to completely evaporate the solvent to obtain an improved phosphoric acid-doped solution. Colloidal solid material with organic phase loaded with inorganic salt;

[0038] c. The colloidal solid material obtained in step b is formed by pressing, the surface is acid-resistant treated, and vacuum-dried and solidified to obtain a heat-resistant fuel cell pro...

Embodiment 3

[0042] a. Dissolve organic substance A in an organic solvent, add insoluble inorganic salt B and disperse, adjust the pH to acidic and completely dissolve inorganic salt B, add additives, raise the temperature to 270°C for 4 hours, add oxidant and stir after the reaction is completed, and obtain A solution of modified organic-metal ion ligands, in which the metal ions are uniformly distributed inside the organic phase;

[0043] b. Centrifuge the solution prepared in step a, wash the centrifuge repeatedly with deionized water, then add it to an aqueous phosphoric acid solution with a mass concentration of 50%, and heat at 200°C to completely evaporate the solvent to obtain an improved phosphoric acid-doped solution. Colloidal solid material with organic phase loaded with inorganic salt;

[0044] c. The colloidal solid material obtained in step b is formed by pressing, the surface is acid-resistant treated, and vacuum-dried and solidified to obtain a heat-resistant fuel cell pro...

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Abstract

The invention discloses a heat-resistant fuel cell proton exchange membrane and a preparation method thereof. The method comprises steps of (a) adding polymer monomer, insoluble inorganic salt and auxiliary agent into organic solvent, heating and reacting to obtain modified organic substance; (b), centrifugally separating, adding phosphoric acid after washing, heating and evaporating the solvent to obtain the colloidal solid material of phosphoric acid doped modified organic phase loading inorganic salt; and (c) after pressing and mol, the heat-resistant fuel cell proton exchange membrane is obtained. The method has the following beneficial effects: By fixing the phosphoryl group in the film material, the invention effectively solves the problem that the conductivity of the film drops dueto the phosphoric acid loss under the high temperature, enables the film to work normally under the environment of higher than 100 DEG C, improves the high-temperature endurance and service durabilityof the film, and is simple to prepare and easy to popularize.

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 heat-resistant fuel cell proton exchange membrane and a preparation method thereof. Background technique [0002] Since the fuel cell began to use DuPont's nafion perfluorosulfonic acid proton exchange membrane in 1966, various technologies have gradually matured. The chemical stability of Nafion membrane is very good, which provides a strong support for fuel cells with long life and high power density. But there are still many shortcomings. One is that it is expensive, and the sulfonation and fluorination process of raw materials is very complicated, which leads to high product prices and lacks competitiveness in the competition in the battery industry; Working in the following and suitable humidity range, once the temperature is too high and the moisture content is too large, the proton conductivity of the membrane mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1069H01M8/1088H01M8/1048
CPCH01M8/1048H01M8/1069H01M8/1088H01M2008/1095Y02E60/50
Inventor 陈庆廖健淞
Owner CHENDU NEW KELI CHEM SCI CO LTD
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