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Preparation method of organic/inorganic composite intermediate/high-temperature proton conductive membrane

A proton-conducting membrane and inorganic composite technology, which is applied to fuel cell components, solid electrolyte fuel cells, circuits, etc., can solve problems such as poor ionic conductivity and poor mechanical strength, and achieve improved proton conductivity and adsorption stability sexual effect

Active Publication Date: 2013-06-26
JUHUA GROUP TECH CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The medium-high temperature proton conductor prepared by directly adding ionic liquid into the polymer matrix has the problems of poor mechanical strength when the content of ionic liquid is high, and poor ionic conductivity when the content of ionic liquid is low
However, reinforced by ordinary inorganic particles (such as SiO 2 、TiO 2 、Al 2 o 3 etc.) cannot effectively solve the above problems

Method used

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Examples

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Effect test

Embodiment 1

[0027] A method for preparing an organic / inorganic medium-high temperature proton conductive membrane, comprising the following steps:

[0028] (1) Mix perfluorosulfonic acid resin, mesoporous silica particles, and dimethylformamide in a mass ratio of 100:70:100 to form a suspension;

[0029] (2) Cast the above suspension on a smooth glass plate and solidify to form a film;

[0030] (3) Soak the above membrane in [dema][TfO] ionic liquid for 8 hours, so that the ionic liquid is absorbed into the membrane, wherein the mass of the ionic liquid absorbed into the membrane is 80% of the mass of the perfluorosulfonic acid resin ;

[0031] (4) The membrane after absorbing the ionic liquid is taken out from the ionic liquid, and the ionic liquid on the surface of the membrane is removed with filter paper to obtain the organic / inorganic composite medium-high temperature proton conductive membrane of the present invention.

[0032] Among them, the equivalent weight of perfluorosulfoni...

Embodiment 2

[0034] A method for preparing an organic / inorganic medium-high temperature proton conductive membrane, comprising the following steps:

[0035] (1) Mix perfluorosulfonic acid resin, mesoporous silica particles, and dimethylacetamide at a mass ratio of 100:5:2000 to form a suspension;

[0036] (2) Cast the above suspension on a smooth glass substrate and solidify to form a film;

[0037] (3) Soak the above membrane in [dema][TfO] ionic liquid for 8 hours, so that the ionic liquid is absorbed into the membrane, and the mass of the ionic liquid absorbed into the membrane is 10% of the mass of the perfluorosulfonic acid resin ;

[0038] (4) The membrane after absorbing the ionic liquid is taken out from the ionic liquid, and the ionic liquid on the surface of the membrane is removed with filter paper to obtain the organic / inorganic composite medium-high temperature proton conductive membrane of the present invention.

[0039] Among them, the equivalent weight of perfluorosulfoni...

Embodiment 3

[0041] A method for preparing an organic / inorganic medium-high temperature proton conductive membrane, comprising the following steps:

[0042] (1) Mix perfluorosulfonic acid resin, mesoporous silica particles, and dimethyl sulfoxide at a mass ratio of 100:40:1000 to form a suspension;

[0043] (2) Cast the above suspension on a smooth glass substrate and solidify to form a film;

[0044] (3) Soak the above membrane in [dema][TfO] ionic liquid for 8 hours, so that the ionic liquid is absorbed into the membrane, and the mass of the ionic liquid absorbed into the membrane is 40% of the mass of the perfluorosulfonic acid resin ;

[0045] (4) The membrane after absorbing the ionic liquid is taken out from the ionic liquid, and the ionic liquid on the surface of the membrane is removed with filter paper to obtain the organic / inorganic composite medium-high temperature proton conductive membrane of the present invention.

[0046] Among them, the equivalent weight of perfluorosulfoni...

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Abstract

The invention discloses a preparation method of an organic / inorganic composite intermediate / high-temperature proton conductive membrane. The preparation method comprises the following steps of: (1) mixing perfluorinated sulfonic acid resin, a mesoporous silica particle, and a solvent at a mass ratio of 100:(5-70):(100-2000) to obtain a suspension; (2) casting the suspension on a smooth and flat substrate to obtain a membrane by curing; (3) soaking the membrane in an ionic liquid to cause the membrane to adsorb the ionic liquid, wherein the mass of the ionic liquid adsorbed into the membrane is 10-80% of that of the perfluorinated sulfonic acid resin; and (4) removing the ionic liquid on the surface of the membrane adsorbed with the ionic liquid to obtain the organic / inorganic composite intermediate / high-temperature proton conductive membrane. The organic / inorganic composite intermediate / high-temperature proton conductive membrane prepared by the method disclosed by the invention has the advantages of high mechanical strength and good intermediate / high-temperature proton conductivity, the intermediate / high-temperature proton conductivity is more than 10<-3>S / cm, the tensile strength is higher than 6.0MPam and the preparation method facilitates wide application of the intermediate / high-temperature proton conductive membrane to the fields of fuel cell, catalysis, sensors and the like.

Description

technical field [0001] The invention relates to a preparation method of a proton conduction membrane, in particular to a preparation method of an organic / inorganic composite medium-high temperature proton conduction membrane. Background technique [0002] A proton exchange membrane fuel cell (PEMFC) is a device that converts the chemical energy of a fuel (such as hydrogen) into electrical energy through an electrochemical reaction. The proton exchange membrane fuel cell has the characteristics of quick start, high efficiency and no pollution, which makes it an important candidate power source for electric vehicles, mobile power sources and backup power sources in the future. [0003] At present, the proton-conducting membrane in the proton membrane fuel cell is mainly perfluorosulfonic acid polymer. Such polymers require low temperature (<90°C) and high ambient humidity to maintain high proton conductivity. Therefore, the low temperature proton membrane fuel cell system...

Claims

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Application Information

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IPC IPC(8): C08J7/00C08J5/22C08L27/18C08K3/36H01M8/10H01M8/02H01M8/1069
CPCY02E60/50Y02P70/50
Inventor 蒋峰景张士林章俊良王树华
Owner JUHUA GROUP TECH CENT
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