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Method for preparing heat-resisting proton exchange film

A proton exchange membrane, temperature-resistant technology, applied in the field of fuel cell material preparation, can solve the problems of difficult large-scale industrial production, difficult process parameters, expensive raw materials, etc., to improve specific power, good electrochemical stability and reliability, improve film-forming effect

Inactive Publication Date: 2003-12-10
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has some shortcomings, such as extremely difficult control of process parameters, difficulty in implementing large-scale industrial production, extremely expensive raw materials, etc. These factors limit its development to varying degrees.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0022] 1) Dissolving 2 parts of polymer polybenzimidazole, 3 parts of heteropolyacid phosphomolybdic acid, and 5 parts of silicon dioxide in the organic solvent dimethylformamide to form a premix;

[0023] 2) Mix the premix with an ultra-high pressure of 12Mpa;

[0024] 3) Ultrasonic waves are introduced to apply composite force to micron and nano-particles, and carry out nano-particle size crushing and whole-chain processing of polymer materials;

[0025] 4) After pouring the slurry formed above to form a film at room temperature, solidify at room temperature for 2 hours, then solidify at 120° C. for 4 hours in an inert atmosphere, cool to room temperature, and remove the film in water to obtain a temperature-resistant proton exchange membrane. Example 2:

example 2

[0026] 1) 2 parts of polymer polyether ketone, 3 parts of heteropoly silicotungstic acid, and 5 parts of silicon dioxide are dissolved in the organic solvent dimethyl sulfoxide to form a premix;

[0027] 2) Mix the premix with an ultra-high pressure of 100Mpa;

[0028] 3) Ultrasonic waves are introduced to apply composite force to micron and nano-particles, and carry out nano-particle size crushing and whole-chain processing of polymer materials;

[0029] 4) After casting the slurry formed above to form a film at room temperature, solidify at room temperature for 4 hours, then solidify at 180° C. for 4 hours in an inert atmosphere, cool to room temperature, and remove the film in water to obtain a temperature-resistant proton exchange membrane. Example 3:

example 3

[0030] 1) Dissolving 2 parts of polymer polyimide, 3 parts of heteropolyacid phosphotungstic acid, and 5 parts of silicon dioxide in the organic solvent dimethylacetamide to form a premix;

[0031] 2) Mix the premix with an ultra-high pressure of 120Mpa;

[0032] 3) Ultrasonic waves are introduced to apply composite force to micron and nano-particles, and carry out nano-particle size crushing and whole-chain processing of polymer materials;

[0033] 4) After casting the slurry formed above to form a film at room temperature, solidify at room temperature for 3 hours, then solidify at 250° C. for 4 hours in an inert atmosphere, cool to room temperature, and remove the film in water to obtain a temperature-resistant proton exchange membrane. Example 4:

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PUM

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Abstract

The method for preparing proton exchange membrane includes the following steps: dissolving membrane matrix high-molecular polymer in solvent, adding inorganic matter to form suspended substance, breaking said suspended substance by using nano breaking technology to obtain uniformly-dispersed mixture, using pouring method to make membrane with compact structure. The membrane has good stability andhigh application temperature, can make pile have good electrochemical stability and reliability, and can raise specific power of fuel cell.

Description

technical field [0001] The invention belongs to the technical scope of fuel cell material preparation, and in particular relates to a temperature-resistant proton exchange membrane preparation method for preparing a proton exchange membrane by doping polymers and inorganic materials. Background technique [0002] In order to increase the operating temperature of existing proton exchange membranes and increase the specific power of fuel cells, doping with inorganic substances is a common method. In order to make the mixing of inorganic substances and high molecular polymers uniform and stable, the solution in the prior art is to use a sol-gel process. The sol-gel method involves the preparation of a concentrated sol of an oxide or hydroxide as a reactant, and the process of converting it into a semi-rigid or gel by removing the solvent, dissolving the heteropolyacid in an organic solvent, undergoing hydrolysis and Polycondensation leads to gradual gelation, and after drying ...

Claims

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Application Information

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IPC IPC(8): B01D67/00H01M2/14H01M4/94
CPCY02E60/50
Inventor 谢晓峰毛宗强徐景明张迪王兆海
Owner TSINGHUA UNIV
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