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Preparation method of water retention type proton exchange membrane for fuel cell

A proton exchange membrane and fuel cell technology, which is applied to fuel cell parts, fuel cells, battery pack parts, etc., can solve problems such as large resistance, and achieve the effect of high strength, uniform thickness, and easy large-scale production.

Active Publication Date: 2010-03-10
SUNRISE POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The water-retaining proton exchange membrane prepared by this method will have a very large resistance due to the multilayer structure of the expanded polytetrafluoroethylene microporous film.

Method used

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  • Preparation method of water retention type proton exchange membrane for fuel cell
  • Preparation method of water retention type proton exchange membrane for fuel cell

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Experimental program
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Effect test

Embodiment 1

[0043] The preparation method is carried out according to the following steps:

[0044] a) Add dimethyl sulfoxide to the PFSA solution with an exchange equivalent of 1100 and a mass concentration of 1% according to the mass ratio of PFSA: dimethyl sulfoxide = 1: 8, and ultrasonically vibrate to prepare a solution;

[0045] b) In the PFSA solution with an exchange equivalent of 1100 and a mass concentration of 5%, add dimethyl sulfoxide according to the mass ratio of PFSA: dimethyl sulfoxide = 1: 4, according to PFSA: silicon dioxide = 1: 0.05 mass ratio, add silica sol, ultrasonically vibrate, and configure B solution;

[0046] c) In the PFSA solution with an exchange equivalent of 1100 and a mass concentration of 5%, add dimethyl sulfoxide according to the mass ratio of PFSA: dimethyl sulfoxide = 1: 1, according to PFSA: silicon dioxide = 1: 0.05 mass ratio, add silica sol, ultrasonically oscillate, and configure C solution;

[0047] d) In the PFSA solution with an exchange...

Embodiment 2

[0060] The preparation method is carried out according to the following steps:

[0061] a) In the PFSA solution with an exchange equivalent of 1100 and a mass concentration of 1.5%, add dimethyl sulfoxide according to the mass ratio of PFSA: dimethyl sulfoxide = 1: 8, according to PFSA: silicon dioxide = 1: 0.03 A mass ratio of , adding silica sol, ultrasonic oscillation, and preparing A solution;

[0062] b) In the PFSA solution with an exchange equivalent of 1100 and a mass concentration of 5%, add dimethyl sulfoxide according to the mass ratio of PFSA: dimethyl sulfoxide = 1: 4, according to PFSA: silicon dioxide = 1: 0.03 mass ratio, add silica sol, ultrasonically vibrate, and configure B solution;

[0063] c) In the PFSA solution with an exchange equivalent of 1100 and a mass concentration of 5%, add dimethyl sulfoxide according to the mass ratio of PFSA: dimethyl sulfoxide = 1: 1, according to PFSA: silicon dioxide = 1: 0.03 mass ratio, add silica sol, ultrasonically o...

Embodiment 3

[0074] The preparation method is carried out according to the following steps:

[0075] a) In the PFSA solution with an exchange equivalent of 1000 and a mass concentration of 1%, according to the mass ratio of PFSA:N,N-dimethylformamide=1:8, add N,N-dimethylformamide, and ultrasonically vibrate , formulated into A solution;

[0076] b) In the PFSA solution with an exchange equivalent of 1000 and a mass concentration of 5%, add N, N-dimethylformamide according to the mass ratio of PFSA: N, N-dimethylformamide = 1: 4, according to PFSA : SiO2=1:0.05 mass ratio, add silica sol, ultrasonically oscillate, and configure B solution;

[0077] c) In the PFSA solution with an exchange equivalent of 1000 and a mass concentration of 5%, add N, N-dimethylformamide according to the mass ratio of PFSA: N, N-dimethylformamide = 1: 1, according to PFSA : SiO2=1:0.05 mass ratio, add silica sol, ultrasonically oscillate, and configure C solution;

[0078] d) In the PFSA solution with an exchan...

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Abstract

The invention discloses a preparation method of a water retention type proton exchange membrane for a fuel cell, including spraying a perfluorinated sulfonic acid resin solution on the surface of an expanded polytetrafluoroethylene micropore film; the method comprises the following steps: filling a perfluorinated sulfonic acid resin component and a silicon dioxide component into micropores of theexpanded polytetrafluoroethylene micropore film in an impregnating way; and controlling the exchanging thickness of a compound proton in a way of spraying the perfluorinated sulfonic acid resin component and the silicon dioxide component. The compound proton exchange membrane prepared by the method not only ensures the absorption capability of water but also reduces the total resistance of the compound proton exchange membrane because water retention components of silicon dioxide is distributed in a gradient way, has a water retention function, reduces the dependency of the proton exchange membrane fuel cell on a humidification system, can ensure the compound proton exchange membrane to normally work under a low-humidification environment, is easy to realize the large-scale production andhas uniform thickness, high humidity strength and good size stability.

Description

technical field [0001] The invention relates to a water-retaining proton exchange membrane for a fuel cell and a preparation method thereof, in particular to a technique for preparing the proton exchange membrane by means of combining dipping and spraying. Background technique [0002] During the working process of the proton exchange membrane fuel cell, the proton exchange membrane must always be kept in a wet state to ensure its good ion conductivity. In order to make the proton exchange membrane fuel cell work normally, the existing technology mostly adopts external humidification to maintain the wet state of the proton exchange membrane, which complicates the water management system of the fuel cell, increases the operation risk of the battery, and also Reduces the efficiency of the battery system. In order to solve this technical problem, a water-retaining composite proton exchange membrane has emerged. The water-retaining composite proton exchange membrane uses the w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M2/16C08J5/22C08L101/06C08K3/36H01M8/1069H01M50/446
CPCY02E60/12Y02E60/50Y02P70/50
Inventor 宋书范邢丹敏侯中军张玉海
Owner SUNRISE POWER CO LTD
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