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A kind of high water retention composite proton exchange membrane and preparation method thereof

A proton exchange membrane and composite technology, which is applied in the field of high water retention composite proton exchange membrane and its preparation, can solve the problems such as mechanical deterioration of proton exchange membranes, achieve improved water management characteristics, strengthen the limiting effect, increase Effect of outlet width

Active Publication Date: 2022-07-19
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the proton exchange membrane prepared by the above method will cause the mechanical deterioration of the proton exchange membrane due to the graft copolymers such as lignosulfonate and styrene.

Method used

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  • A kind of high water retention composite proton exchange membrane and preparation method thereof
  • A kind of high water retention composite proton exchange membrane and preparation method thereof
  • A kind of high water retention composite proton exchange membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A preparation method of a high water-retention composite proton exchange membrane, the composite proton exchange membrane comprises a carbon-supported catalyst, a carbon nanofiber or carbon nanotube filling material and an ion conductor, the carbon-supported catalyst and the three-dimensional filling material are mixed and arranged, and are The ion conductor is wrapped or partially wrapped, this structure is easy to form more three-phase contacts and higher internal mass transfer space inside the catalytic layer electrode, and the thickness of the three-dimensional catalytic layer electrode is 6-50 μm;

[0041] The preparation method of the high water-retention composite proton exchange membrane is as follows:

[0042] Weigh 10 mg of lignosulfonic acid (sodium) hydrogel, disperse it into 50 mg of N,N-dimethylformamide solvent, mix uniformly, and let stand for 5 minutes, and then mechanically stir for 1.5 hours to obtain a dispersion; then Weigh 9.8g of perfluorosulfonic...

Embodiment 2

[0044] Weigh 25 mg of acrylic hydrogel, disperse it in 141.7 mg of N,N-dimethylacetamide solvent, mix it uniformly, let it stand for 10 minutes, and then mechanically stir for 2.0 h to obtain a dispersion; then weigh 2.375 g perfluorosulfonic acid resin D79 (20wt.%), which was fully mixed by magnetic stirring and ultrasonic treatment at the same time to obtain a prefabricated film solution; in the formed prefabricated film solution, the ratio of acrylic hydrogel to solvent was 15:85, acrylic acid The ratio of hydrogel-like and perfluorosulfonic acid resin is 5:95; the fully mixed membrane-forming solution is made into membrane by electrospinning method, and finally the composite proton exchange membrane obtained by spinning is placed in a drying storage box After drying treatment, the treatment time is 12h, that is, the composite proton exchange membrane with high water retention is obtained.

Embodiment 3

[0046] Weigh 5mg of lignosulfonic acid (sodium) hydrogel, disperse it in isopropanol, the mass of isopropanol is 50mg, mix evenly and let stand for 5 minutes, and then perform magnetic stirring for 2.5h to obtain a dispersion liquid ; Then weigh 2.475g perfluorosulfonic acid resin D79 (20wt.%), and disperse it in 2.475g isopropanol, after it is fully mixed (magnetic stirring), the above two dispersions are uniformly mixed by magnetic stirring method and ultrasonic method at the same time to form a prefabricated Film-forming liquid; in the pre-formed film-forming liquid, the ratio of lignosulfonic acid (sodium) hydrogel to perfluorosulfonic acid resin is 1:99; then take a clean glass film-forming plate with an effective area of ​​25cm 2 , using the solution casting method to spread the above-mentioned completely dispersed prefabricated membrane liquid in a glass template, and place it in a drying storage box for drying treatment for 8 hours. membrane.

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Abstract

The invention discloses a high water-retention composite proton exchange membrane and a preparation method thereof. A specific type of polymer hydrogel is added to a perfluorosulfonic acid resin solution and dried by a certain preparation method to form polymer-containing water The composite proton exchange membrane of the gel, with the better hydrophilic and water retention properties of the polymer hydrogel, helps to improve the water management properties of the proton exchange membrane under low humidity operation, and improve the output of the battery operating at high current density performance to meet the application requirements of high moisturizing proton exchange membranes in specific scenarios. The composite proton exchange membrane containing the polymer nanohydrogel proposed in the present invention can be used as a proton exchange membrane in proton exchange membrane fuel cells, direct alcohol fuel cells, electrochemical sensors or other electrochemical devices.

Description

technical field [0001] The invention belongs to the field of fuel cells, and in particular relates to a high water-retention composite proton exchange membrane and a preparation method thereof. Background technique [0002] A proton exchange membrane fuel cell (PEMFC) is an energy conversion device capable of directly converting chemical energy into electrical energy. It has significant advantages such as high energy conversion efficiency (40-60%), low operating temperature, fast start-up speed, and environmental friendliness, and is currently the main technical form of vehicle fuel cells at home and abroad. But in fact, due to the need to use a large number of high-cost perfluorosulfonic acid proton exchange membranes (mainly Nafion series) and platinum-based catalyst materials, the cost of PEMFC systems for vehicles remains high and it is difficult to truly promote them on a large scale. [0003] The currently commercialized proton exchange membranes are produced by GORE ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/1086H01M8/1046
CPCH01M8/1086H01M8/1046Y02E60/50
Inventor 郝金凯邵志刚张洪杰吕波
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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