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Method for preparation of membrane electrode of water-keeping proton exchange film fuel cells

A technology of proton exchange membrane and fuel cell membrane, which is applied to fuel cell parts, fuel cells, battery electrodes, etc., and can solve the problems of structural defects of inorganic oxide catalytic layer, influence of electronic conduction of catalytic layer, difficulty in uniform dispersion, etc. , to achieve good water retention capacity, high dispersion and cost reduction

Inactive Publication Date: 2007-09-19
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because nanoscale particles are difficult to disperse uniformly through macroscopic methods, the uneven dispersion of inorganic oxides will cause structural defects or even cracks in the catalytic layer, and may affect the electronic conduction of the catalytic layer.

Method used

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  • Method for preparation of membrane electrode of water-keeping proton exchange film fuel cells

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Experimental program
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Effect test

Embodiment 1

[0028] (1) Take 100 grams of perfluorosulfonic acid resin solution (Nafion DE 520) with a weight concentration of 5%, adjust the pH value to 7.5 with NaOH, then transfer to 100 grams of N-methylpyrrolidone, and stir it electromagnetically for 30 minutes to make The perfluorosulfonic acid resin was fully dissolved in N-methylpyrrolidone; the solution was distilled for 5 hours to remove moisture in the solution until the solution temperature reached 203°C, and at the end, the perfluorosulfonic acid resin (Nafion DE 520 solution) / N- Methylpyrrolidone solution.

[0029] (2) Weigh 1.7 grams of tetraethoxysilane (about 0.5 grams of silicon dioxide in total), dissolve in the perfluorosulfonic acid resin (Nafion DE 520 solution) / N-methylpyrrolidone solution prepared in step (1), Electromagnetic stirring was performed for 30 minutes to obtain an inorganic oxide precursor solution.

[0030] (3) In the inorganic oxide precursor solution, add an excessive amount of HCl solution (HCl cont...

Embodiment 2

[0035] (1) Take 80 grams of sulfonated polyether ether ketone resin solution with a weight concentration of 10%, adjust the pH value to 7 with NaOH, then transfer to 150 grams of ethylene glycol-methyl ether, and electromagnetically stir for 30 minutes to make the sulfonated polyether ether ketone resin solution Polyetheretherketone resin is fully soluble in ethylene glycol-methyl ether. The solution was distilled for 6 hours to remove water in the solution until the temperature of the solution reached 125° C., and ended; a sulfonated polyether ether ketone resin / ethylene glycol-methyl ether solution was obtained.

[0036] (2) Weigh 1.2 g of ethyl titanate, dissolve it in the sulfonated polyether ether ketone resin / ethylene glycol-methyl ether solution prepared in step (1), and stir it electromagnetically for 30 minutes to obtain an inorganic oxide precursor solution.

[0037] (3) Add an excess of HCl solution (the HCl content is 37wt.% and the water content is 63wt%) to the s...

Embodiment 3

[0041] (1) Take 500 grams of weight concentration and be 3% sulfonated trifluorostyrene resin, adjust the pH value to 6.5 with NaOH, then transfer to 900 grams of ethylene glycol-ether (making the sulfonated trifluorostyrene resin mixed The content in the solution reaches 1-9wt.%), and electromagnetic stirring is performed for 30 minutes to fully dissolve the sulfonated trifluorostyrene resin in ethylene glycol-ether. Distill to remove water in the solution until the temperature of the solution reaches 136°C, and end; a sulfonated trifluorostyrene resin / ethylene glycol-ether solution is obtained.

[0042] (2) Take 0.1 g of isopropyl titanate, dissolve it in the sulfonated trifluorostyrene resin / ethylene glycol-ether solution prepared in step (1), and stir it electromagnetically for 30 minutes to obtain an inorganic oxide precursor solution.

[0043] (3) In the inorganic oxide precursor solution, add an excess of HCl solution (HCl content is 37wt.%, water content is 63wt%) that...

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Abstract

The invention relates to a method for preparing membrane electrode of proton exchange membrane fuel cell. A method for preparing membrane electrode of water-conserving proton exchange membrane fuel cell is characterized by including following steps: 1) preparing proton conduction polymer modified by inorganic oxide nano-particles: a) firstly, the PH value of the solution containing 1.2 to 10 wt. % proton conduction polymer is regulated to 6.5 to 7.5 by NaOH, and then the solution is transferred into anhydrous organic solvent, thus, solution A can be obtained, in succession, the solution A is distilled to obtain solution B; b) according to the weight ratio of inorganic oxide to proton conduction polymer 0.01 : 1 to 0.1 : 1, the inorganic oxide precursor of the inorganic oxide is added into the solution B prepared in step a) and then is churned for 20 to 30 minute thereby obtaining inorganic oxide precursor solution; c) the preparation of proton conduction polymer modified by inorganic oxide nano-particles; 2) preparing membrane electrode. The membrane electrode prepared by the invention has good water-conserving capacity.

Description

technical field [0001] The invention relates to a preparation method of a membrane electrode of a proton exchange membrane fuel cell. Background technique [0002] Hydrogen is an element ubiquitous in nature and is a renewable and clean energy. Scientists believe that hydrogen energy will make up for and gradually replace the increasingly depleted fossil energy sources such as coal and oil in the 21st century, and become an important part of the world's energy structure. Proton Exchange Membrane Fuel Cell (PEMFC) is an important way to convert hydrogen energy into electrical energy. Its energy conversion efficiency is as high as 50%, and its working temperature is low and its noise is low. The only emission is pure water. , can be widely used in vehicle power source and fixed power station power supply. Therefore, it is generally believed that fuel cells are the preferred clean and efficient power generation technology in the 21st century (Yi Baolian, Fuel Cells—Principles...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M8/02H01M8/1004
CPCY02E60/50
Inventor 唐浩林潘牧邬静杰李跃卿宛朝辉
Owner WUHAN UNIV OF TECH
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