Composite proton exchange membrane for high-temp proton exchange membrane fuel cell and preparation method

A proton exchange membrane, fuel cell technology, applied in solid electrolyte fuel cells, fuel cells, fuel cell parts and other directions, can solve the problems of gas channeling, large increase, the impact of fuel cell durability, and achieve good high temperature water retention performance , the effect of good durability

Inactive Publication Date: 2008-01-02
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Otherwise, after the fuel cell runs for a long time, the probability of blow-by of the reaction gas oxygen and hydrogen between the cathode and anode will increase greatly, which will adversely affect the durability of the fuel cell.

Method used

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  • Composite proton exchange membrane for high-temp proton exchange membrane fuel cell and preparation method
  • Composite proton exchange membrane for high-temp proton exchange membrane fuel cell and preparation method
  • Composite proton exchange membrane for high-temp proton exchange membrane fuel cell and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Preparation of single-layer porous polymer reinforced composite proton exchange membrane: select expanded polytetrafluoroethylene microporous membrane with an average thickness of 3 μm, an average pore diameter of 0.2 μm and a porosity of 85%, immerse in isopropanol for cleaning and pre-swelling treatment After taking it out and drying it, clamp the film with a thin aluminum frame; mix 33ml of tetraethyl orthosilicate with 300ml of absolute ethanol, then add dropwise 240ml of absolute ethanol and 60ml of hydrochloric acid with a molar concentration of 0.3M solution, continuously stirred at 50°C for 12h to obtain nano-SiO 2 aqueous solution; according to SiO 2 : Nafion  The mass ratio of the resin to 1:10 will be nano-SiO 2 Aqueous solution and 5wt% Nafion  Solution (DuPont company product) mixed, ultrasonic 30min, prepared SiO 2 with Nafion solution; the porous polymer membrane was immersed in SiO 2 After 20 minutes, take out the membrane, place it horizontally o...

Embodiment 2

[0039] Single-layer PEM is basically the same as Example 1, except that the expanded polytetrafluoroethylene microporous membrane used has an average thickness of 5 μm, an average pore diameter of 0.5 μm, and a porosity of more than 80%; The previous step was repeated 3 times for the membrane. The preparation method of the multilayer PEM is basically the same as that of Example 1, except that the number of layers of the porous polymer-reinforced composite proton exchange membrane in the stack is 3, and the hot pressing pressure is 2.5 MPa. The experimental methods of film stretching, single cell performance and accelerated life test are the same as those in Example 1. After measurement, the tensile strengths of expanded polytetrafluoroethylene microporous membrane, single-layer PEM and multi-layer PEM are 15MPa, 19MPa, and 37MPa, respectively. Table 3 and Table 4 respectively show the battery performance test and life acceleration test results of the composite membrane. It is...

Embodiment 3

[0045] The single-layer PEM is basically the same as in Example 1, except that the expanded polytetrafluoroethylene microporous membrane used has an average thickness of 10 μm, an average pore diameter of 0.5 μm, and a porosity greater than 80%; Repeat the previous step 4 times. The preparation method of the multilayer PEM is basically the same as that of Example 1, except that the number of layers of the porous polymer-reinforced composite proton exchange membrane in the stack is 2, and the hot pressing pressure is 5 MPa. The experimental methods of film stretching, single cell performance and accelerated life test are the same as those in Example 1. The tensile strengths of expanded polytetrafluoroethylene microporous membrane, single-layer PEM and multi-layer PEM are 22MPa, 28MPa and 47MPa respectively. Table 5 and Table 6 respectively show the results of the battery performance test and life acceleration test of the composite proton exchange membrane. It is not difficult ...

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Abstract

This invention relates to a compound proton exchange film of a high temperature proton exchange film fuel battery, characterizing that said film is a multiplayer proton exchange film composite by multiplayer multi-hole polymer intensified compound proton exchange films. The multi-hole polymer is a buck Teflon micro-hole film, which makes up of the multi-hole polymer enhanced compound proton exchange film together with the inorganic nm particles and solid poly-electrolyte fillers. The preparation method of the exchange film is: a micro- pore film is pre-processed and fastened filled by inorganic nm particles and solid poly electrolytes to be rolled to single layer multi-hole polymer intensified proton exchange film to be laminated and hot-pressed to form a multiplayer proton exchange film.

Description

technical field [0001] The invention relates to a composite proton exchange membrane for a high-temperature proton exchange membrane fuel cell and a preparation method thereof, in particular to a multilayer proton exchange membrane composed of multilayer porous polymer reinforced composite proton exchange membranes and a preparation method thereof, and the prepared multilayer Proton exchange membrane has good high temperature water retention performance, anti-reactive gas permeation performance and mechanical properties. Background technique [0002] A fuel cell (Fuel Cell, FC) is an electrochemical power generation device that operates cleanly, efficiently and quietly. The proton exchange membrane fuel cell (Proton Exchange Membrane Fuel Cell, PEMFC) has a good application prospect in mobile appliances, automobiles and other industries due to its low operating temperature and high specific power density. [0003] At present, increasing the operating temperature of proton e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/02H01M8/10H01M8/12H01M2/16C08J5/22C08J9/00H01M8/1051H01M8/1053H01M8/1069
CPCY02E60/12Y02E60/521Y02E60/525Y02E60/50
Inventor 木士春陈磊唐浩林潘牧袁润章
Owner WUHAN UNIV OF TECH
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