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Construction method for proton exchange membrane with three-dimensional high specific surface area surface, and high performance membrane electrode based on proton exchange membrane

A technology of proton exchange membrane and high specific surface area, which is applied in the direction of circuits, fuel cells, electrical components, etc., can solve the problems of complex preparation methods, the gap between the requirements of the contact interface between the proton exchange membrane and the catalytic layer, and the large thickness of the porous membrane. The preparation method is simple and easy, the performance of the membrane electrode is improved, and the cost is low

Inactive Publication Date: 2018-09-07
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Although there are many work reports on the preparation of porous membranes and their application as electrochemical devices, the above reports have various defects such as complicated preparation methods and large thickness of porous membranes, and the requirement to improve the interface between the proton exchange membrane and the catalytic layer still exists. large gap

Method used

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  • Construction method for proton exchange membrane with three-dimensional high specific surface area surface, and high performance membrane electrode based on proton exchange membrane
  • Construction method for proton exchange membrane with three-dimensional high specific surface area surface, and high performance membrane electrode based on proton exchange membrane
  • Construction method for proton exchange membrane with three-dimensional high specific surface area surface, and high performance membrane electrode based on proton exchange membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0037] The first step is to take a 4cm×4cm Nafion212 proton exchange membrane, first place it in 15% hydrogen peroxide at 80°C for 1 hour, wash it with distilled water, and put it in 1mol.L -1 treated in a sulfuric acid solution at 80°C for 1 hour, and then washed with distilled water. Place the treated proton exchange membrane on the fixed frame of the prepared porous membrane and fix it, the size of the active area is 6.25cm 2 , to prevent the film from shrinking and deforming during the spraying of the porous layer slurry;

[0038] The second step is to weigh 5mg zinc oxide, 11mg perfluorosulfonic acid resin solution (5wt% Nafion, DuPont) and 0.3g isopropanol respectively according to the mass ratio of 5:11:300, mix and disperse into a porous layer slurry by ultrasonic vibration Material spare.

[0039] In the third step, the porous layer slurry in the second step is sprayed onto one side of the proton exchange membrane by spraying method, and then heat-treated at 50° C. ...

Embodiment 2

[0046]In addition to changing the nafion212 film into a nafion211 film, changing the mass percent concentration of 15% hydrogen peroxide into a mass percent concentration of 5% hydrogen peroxide, and changing the perfluorosulfonic acid resin solution (5wt% Nafion, DuPont) into perfluorosulfonic acid The acid resin solution (0.1wt% Nafion) and the mass ratio of 5:11:300 was changed to 5:200:2000, and the rest of the steps were the same as in Example 1.

[0047] image 3 It is the scanning electron micrograph of embodiment 2. It can be found in the figure that after the ratio is changed, the distribution form of the pores also changes.

Embodiment 3

[0049] In addition to changing the nafion212 membrane to nafionhp membrane, changing the sulfuric acid solution of 1mol.L-1 to 0.5mol.L-1 sulfuric acid solution, changing zinc oxide to magnesium oxide and changing the mass ratio of Except the mass ratio of 5:20:300, all the other steps are identical with embodiment 1.

[0050] Figure 4 It is the scanning electron micrograph of embodiment 3. It can be found in the figure that the pore size and distribution are changed by changing the pore-forming agent and the ratio.

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Abstract

The invention discloses a construction method for a proton exchange membrane with a three-dimensional high specific surface area surface, and a high performance membrane electrode based on a proton exchange membrane. The method comprises the following steps: (1) preprocessing the proton exchange membrane; (2) mixing one or multiple types of pore-forming agent and perfluorinated sulfonic acid resinsolution which can be easily removed in water or low-boiling-point solvent, and carrying out ultrasound to form porous-layer slurry; (3) adopting a coating technology to coat one side of the proton exchange membrane layer with the porous-layer slurry to obtain a porous membrane precursor; (4) carrying out acid treatment on the porous membrane precursor, and washing with distilled water to obtainthe porous membrane used for a proton exchange membrane fuel battery. Compared with a commercial proton exchange membrane, the porous membrane prepared with the method has the advantages of regular three-dimensional porous structure and large specific surface area on a premise that membrane thickness is not obviously increased, and the performance of the final prepared membrane electrode of the proton exchange membrane fuel battery is improved.

Description

technical field [0001] The invention relates to the technical field of proton exchange membrane fuel cells, in particular to a construction method of a proton exchange membrane with a three-dimensional high specific surface area surface and a high-performance membrane electrode based on the proton exchange membrane. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is a new type of green energy technology that can directly convert the chemical energy of fuel into electrical energy. It has the advantages of high energy conversion efficiency, high power density, no greenhouse gas emissions, and low-temperature start-up. It has wide application prospects in automobile power and portable power generation equipment. Therefore, research on high-performance proton exchange membrane batteries has become a hot topic in new energy research fields. [0003] Proton exchange membrane fuel cell membrane electrodes, as the core components of proton exchange membrane...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1041H01M8/1067
CPCH01M8/1041H01M8/1067Y02E60/50
Inventor 廖世军刘广智叶跃坤其他发明人请求不公开姓名
Owner SOUTH CHINA UNIV OF TECH
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