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

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...

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

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