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Composite proton exchange film for anti-gas osmosising fuel cell and production thereof

A proton exchange membrane, fuel cell technology, applied in solid electrolyte fuel cells, fuel cells, fuel cell components and other directions, can solve the problems of battery short circuit, reduce the durability of fuel cells, etc., achieve low permeability, good resistance to reaction The effect of gas permeability, good durability performance

Inactive Publication Date: 2007-09-05
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the porous polymer membrane is filled, 5-10% of the pores still remain in the composite membrane, which will increase the probability of blow-by of oxygen and hydrogen in the reaction between the cathode and anode, thereby reducing the durability of the fuel cell.
In addition, metal particles such as filled Pt may be locally connected to form a conductive network, which can easily cause a short circuit in the battery.

Method used

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  • Composite proton exchange film for anti-gas osmosising fuel cell and production thereof
  • Composite proton exchange film for anti-gas osmosising fuel cell and production thereof
  • Composite proton exchange film for anti-gas osmosising fuel cell and production thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Select an expanded polytetrafluoroethylene microporous membrane with an average thickness of 10 μm, an average pore diameter of 0.2 μm, and a porosity of 85%, immerse in isopropanol to clean and pre-swell, and after drying, use a thin aluminum frame to clamp the membrane Tight; mix 33ml of tetraethyl orthosilicate and 300ml of absolute ethanol evenly, then add dropwise the mixture of 240ml of absolute ethanol and 60ml of hydrochloric acid with a molar concentration of 0.3M, and keep stirring at a temperature of 50°C for 12h. containing nano-SiO 2 aqueous solution; according to SiO 2 : Nafion  The mass ratio of the resin is 1:10 with nano-SiO 2 Aqueous solution and 5wt% Nafion  Solution (DuPont company product) mixed, ultrasonic 30min, prepared SiO 2 and Nafion solution; the expanded polytetrafluoroethylene microporous membrane was immersed in the prepared SiO 2 with Nafion  solution, after 20 minutes, take out the film, place it horizontally on a heating plate ...

Embodiment 2

[0048] The preparation method of the multilayer PEM is basically the same as that of Example 1, except that the expanded polytetrafluoroethylene microporous membrane has an average thickness of 25 μm, an average pore diameter of 0.5 μm, and a porosity of more than 80%; the inorganic nano Particles are TiO 2 , the preparation method is as follows: add 25ml of glacial acetic acid to 100ml of tetrabutyl titanate, mix well, slowly pour into 600ml of water under vigorous stirring, continue stirring for 3h, after the hydrolysis is complete, add 10ml of 70wt% nitric acid , heated to 80°C and continued to stir for 2h to obtain nano-TiO 2 Colloidal solution; as TiO 2 : Nafion  The mass ratio of the resin to 1:5 will be nano-TiO 2 Aqueous solution with 5wt% Nafion  The solution was mixed and ultrasonicated for 30min; the carbon-supported Pt electrocatalyst with a Pt loading of 40wt% was fully dispersed in TiO 2 In Nafion solution, the mass ratio of Pt to solid polymer electrolyte...

Embodiment 3

[0053] The multilayer PEM is basically the same as in 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 inorganic nanoparticles used is Zr(HPO 4 ) 2 , the preparation method is as follows: take 1.5M zirconium oxychloride (ZrOCl 2 ) solution 100ml and the dehydrated alcohol of 400ml are evenly mixed, then dropwise add the mixed solution of the dehydrated alcohol of 400ml and 1M phosphoric acid 20ml, continue to stir 24h under the temperature of 80 ℃, obtain containing nanometer Zr (HPO 4 ) 2 Aqueous solution; according to Zr(HPO 4 ) 2 with Nafion  The mass ratio of the resin is 1:100 and the nano-Zr(HPO 4 ) 2 Aqueous solution and 5wt% Nafion  The solution was mixed and ultrasonicated for 10 min; the carbon-supported Pt electrocatalyst with a Pt loading of 40wt% was fully dispersed in Zr(HPO 4 ) 2 In Nafion solution, the mass ra...

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PUM

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Abstract

The composite proton exchange film for composite proton exchange film fuel cell is prepared through compounding three layers of porous polymer reinforced composite proton exchange film. It includes one thin layer of inorganic nanometer particle and solid polyelectrolyte, one layer of inorganic nanometer particle and solid polyelectrolyte filled and porous polymer reinforced composite proton exchange film, one thin layer of inorganic nanometer particle and solid polyelectrolyte, and one layer of inorganic nanometer particle, Pt metal particle and solid polyelectrolyte filled and porous polymer reinforced composite proton exchange film, arranged from surface to inside. It is prepared through superposing the said film layers and hot pressing. The composite proton exchange film has high mechanical performance, high water keeping performance, self-humidifying performance and high reaction gas penetration resistance.

Description

technical field [0001] The invention relates to a composite proton exchange membrane for fuel cells and a preparation method thereof, in particular to a multilayer proton exchange membrane composed of three layers of porous polymer reinforced composite proton exchange membranes and a preparation method thereof. The prepared multilayer proton exchange membrane has Good water retention performance, self-humidification function and anti-reactive gas permeability. Background technique [0002] A fuel cell (Fuel Cell, FC) is an electrochemical power generation device that operates cleanly, efficiently and quietly. Proton Exchange Membrane Fuel Cell (PEMFC) has a good application prospect in industries such as mobile appliances and automobiles due to its low operating temperature and high specific power density. [0003] The proton conduction of the proton exchange membrane currently used in fuel cells requires water, and the water produced by the cathode reaction is not enough t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/02H01M8/10H01M2/14C08J5/22H01M8/1053H01M8/1069
CPCY02E60/521Y02E60/12Y02P70/50Y02E60/50
Inventor 木士春陈磊潘牧袁润章
Owner WUHAN UNIV OF TECH
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