Preparation method of anti methanol permeation proton exchange film

A proton exchange membrane, methanol-resistant technology, applied in electrical components, battery electrodes, circuits, etc., can solve problems such as hindering the cathode electrochemical reaction, affecting the development and application of direct methanol fuel cells, and achieving good chemical stability and proton conduction. The effect of improving the resistance to methanol penetration and electrochemical stability, and improving the specific power

Inactive Publication Date: 2005-08-17
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

When this perfluorocarbon polymer sulfonic acid ion exchange membrane is used in direct methanol fuel cells, there is a problem that methanol permeates from the anode to the cathode to hinder the electrochemical reaction of the cathode, and its permeability is as high as 40%, which greatly affects the direct methanol fuel cell. Development and Application of Fuel Cells

Method used

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  • Preparation method of anti methanol permeation proton exchange film
  • Preparation method of anti methanol permeation proton exchange film
  • Preparation method of anti methanol permeation proton exchange film

Examples

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example 1

[0022] ①Dissolve 1 part of polybenzimidazole containing sulfonic acid side groups in 10 parts of organic solvent dimethylformamide to form a uniform mixture;

[0023] ② Add 8 parts of silicon dioxide to the mixture to form a suspension;

[0024] ③ Mix the suspension with 180Mpa ultra-high pressure;

[0025] ④Introduce ultrasonic waves, apply ultrasonic vibration force to suspended matter, and carry out nano-crushing of suspended matter and whole-chain treatment of aromatic heterocyclic polymers;

[0026] ⑤ After casting the slurry formed above to form a film at room temperature, solidify at room temperature for 2 hours, then solidify at 100°C in an inert atmosphere for 4 hours, cool to room temperature, and remove the membrane in water to obtain a methanol permeation-resistant proton exchange membrane.

example 2

[0028] ① Dissolving 1 part of polyphenylquinoxaline containing sulfonic acid side groups in 12 parts of organic solvent dimethylacetamide to form a uniform mixture;

[0029] ② Add 6 parts of titanium dioxide to the mixture to form a suspension;

[0030] ③ Mix the suspension with 120Mpa ultra-high pressure;

[0031] ④Introduce ultrasonic waves, apply ultrasonic vibration force to suspended matter, and carry out nano-crushing of suspended matter and whole-chain treatment of aromatic heterocyclic polymers;

[0032] ⑤ After casting the slurry formed above to form a film at room temperature, solidify at room temperature for 3 hours, then solidify at 140°C for 4 hours in an inert atmosphere, cool to room temperature, and remove the membrane in water to obtain a methanol permeation-resistant proton exchange membrane.

example 3

[0034] ① 1 part of polypyrrolone containing sulfonic acid side groups is dissolved in 14 parts of organic solvent dimethyl sulfoxide to form a homogeneous mixture;

[0035] ② Add 10 parts of silicon dioxide to the mixture to form a suspension;

[0036] ③ Mix the suspension with 160Mpa ultra-high pressure;

[0037] ④Introduce ultrasonic waves, apply ultrasonic vibration force to suspended matter, and carry out nano-crushing of suspended matter and whole-chain treatment of aromatic heterocyclic polymers;

[0038] ⑤ After casting the slurry formed above to form a film at room temperature, solidify at room temperature for 4 hours, then solidify at 170°C in an inert atmosphere for 4 hours, cool to room temperature, and remove the film in water to obtain a methanol permeation-resistant proton exchange membrane.

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Abstract

The method adds aromatic hetero-ring polymer contained with sulphonic acid side-group into solvent to form uniform mixing matter and then to add inorganic matter to form suspended matter. The film can be produced by pouring preparation process through using nano-breaking technique to break off the suspended matter for obtaining uniform-scattered size. The product has good chemical stability and proton conductivity with methanol permeability less than 5%.

Description

technical field [0001] The invention belongs to the technical scope of fuel cell material preparation, and in particular relates to a kind of anti-methanol permeation proton exchange membrane used for direct methanol fuel cell by doping aromatic heterocyclic polymers containing sulfonic acid side groups and inorganic materials to prepare proton exchange membranes Preparation. Background technique [0002] The proton exchange membrane currently used in direct methanol fuel cells is a perfluorocarbon polymer sulfonic acid type ion exchange membrane. When this perfluorocarbon polymer sulfonic acid ion exchange membrane is used in direct methanol fuel cells, there is a problem that methanol permeates from the anode to the cathode to hinder the electrochemical reaction of the cathode, and its permeability is as high as 40%, which greatly affects the direct methanol fuel cell. Development and application of fuel cells. Contents of the invention [0003] The object of the prese...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/22H01M2/14H01M4/88
CPCY02E60/12Y02E60/50
Inventor 谢晓峰毛宗强徐景明张迪王兆海
Owner TSINGHUA UNIV
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