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Composite proton exchange membrane for high-temperature fuel cell and preparation method of composite proton exchange membrane

A high-temperature fuel cell and proton exchange membrane technology, which is applied to fuel cells, fuel cell parts, battery pack parts, etc., can solve the problems of unbalanced effect and unsatisfactory battery performance.

Inactive Publication Date: 2014-08-13
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although each material has shown its own advantages, the optimal balance between physical dimensional stability and proton conductivity cannot be obtained, and the battery performance is not ideal under high temperature and low humidity conditions.

Method used

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  • Composite proton exchange membrane for high-temperature fuel cell and preparation method of composite proton exchange membrane
  • Composite proton exchange membrane for high-temperature fuel cell and preparation method of composite proton exchange membrane
  • Composite proton exchange membrane for high-temperature fuel cell and preparation method of composite proton exchange membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Take a polyimide film with a thickness of 20 μm, and use a UV laser to etch ordered straight-through holes with a diameter of 5-10 μm on the surface, with a hole spacing of 20-70 μm, and use the above acid-base (1M potassium hydroxide and 1M hydrochloric acid) method for surface treatment to obtain hydrophilic properties. Place the hydrophilic polyimide matrix film in a 5% perfluorosulfonic acid resin solution (Nafion DE520, EW value 1000, solvent is isopropanol and water at a mass ratio of 10:9) for 10 minutes , then take it out and hang it to dry at room temperature, then put it in a vacuum drying oven, adjust the temperature to 150°C, heat treatment for 60 seconds, repeat the above dipping treatment steps until the thickness of the composite film reaches 25±2μm; dip the prepared composite film in Remove surface activity in isopropanol solution for 5 minutes, soak in 80°C deionized water for 10 minutes, then take it out and put it in a vacuum drying oven for heat trea...

Embodiment 2

[0027] Take a polyimide film with a thickness of 20 μm, and use a UV laser to etch through holes with a diameter of 50-200 μm on the surface, keeping the hole spacing unchanged, and use the above acid-base (1M potassium hydroxide and 1M hydrochloric acid) method for surface treatment to obtain Hydrophilic properties. Place the hydrophilic polyimide matrix film in a 5% perfluorosulfonic acid resin solution (Nafion DE520, EW value 1000, solvent is isopropanol and water at a mass ratio of 10:9) for 10 minutes , then take it out and hang it to dry at room temperature, then put it in a vacuum drying oven, adjust the temperature to 150°C, heat treatment for 60 seconds, repeat the above dipping treatment steps until the thickness of the composite film reaches 25±2μm; dip the prepared composite film in Remove surface activity in isopropanol solution for 5 minutes, soak in 80°C deionized water for 10 minutes, then take it out and put it in a vacuum drying oven for heat treatment at 120...

Embodiment 3

[0030] Take a polyimide film with a thickness of 20 μm, and use a UV laser to etch a straight-through hole with a diameter of 5-200 μm on the surface, and use the above acid-base (1M potassium hydroxide and 1M hydrochloric acid) method for surface treatment to obtain hydrophilic properties. Place the hydrophilic polyimide matrix film in a 5% perfluorosulfonic acid resin solution (Nafion DE520, EW value 1000, solvent is isopropanol and water at a mass ratio of 10:9) for 10 minutes , then take it out and hang it to dry at room temperature, then put it in a vacuum drying oven, adjust the temperature to 150°C, heat treatment for 60 seconds, repeat the above dipping treatment steps until the thickness of the composite film reaches 25±2μm; dip the prepared composite film in Remove surface activity in isopropanol solution for 5 minutes, soak in 80°C deionized water for 10 minutes, then take it out and put it in a vacuum drying oven for heat treatment at 120°C for 40 seconds to obtain ...

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Abstract

The invention provides a composite proton exchange membrane for a high-temperature fuel cell and a preparation method thereof. The exchange membrane is a composite proton exchange membrane based on UV laser etching polyimide matrix, which is composed of a polyimide matrix film with a uniform and ordered through-hole structure, which is impregnated to prepare a perfluorosulfonic acid resin membrane. The preparation method is to use UV laser etching technology to prepare a uniform and orderly through-hole structure on the surface of polyimide film, improve its hydrophilic performance through acid-base hydrophilic treatment, and then add it to the treated polyimide matrix film. The perfluorosulfonic acid resin solution is filled, and then heat-treated to obtain a composite proton exchange membrane with a UV laser etched polyimide matrix. The prepared composite proton exchange membrane has the characteristics of high temperature water retention, high mechanical strength, low gas permeability, low swelling stress, etc., and is especially suitable for proton exchange membrane fuel cells.

Description

technical field [0001] The invention relates to the field of proton exchange membrane materials for fuel cells, in particular to a composite proton exchange membrane for high-temperature fuel cells and a preparation method thereof. Background technique [0002] At present, the most commonly used fuel cell proton exchange membrane is the Nafion series perfluorosulfonic acid proton exchange membrane produced by DuPont of the United States. Although this type of proton exchange membrane has excellent proton conduction and corrosion resistance, it is very dependent on the presence of water during its use. Under high temperature and low humidity conditions, this type of proton exchange membrane has poor water retention capacity and battery performance Instability not only reduces the kinetic speed of its catalyzed electrode reaction, but also leads to a serious decline in the proton conductivity. At the same time, drastic changes in temperature and humidity during battery operat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/02H01M2/16C08J7/12C08L79/08H01M8/124
CPCY02E60/50
Inventor 唐浩林郭伟潘牧肖攀陈蕊汪广进
Owner WUHAN UNIV OF TECH
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