Process for preparing proton composite exchange membrane for high temperature proton exchange membrane fuel battery

A proton exchange membrane and fuel cell technology, which is used in the field of preparation of proton exchange membrane composite membranes, can solve the problem that proton exchange membranes cannot work effectively at high temperatures, and achieve strong water absorption and water retention capabilities, large surface area, high water absorption and The effect of water retention capacity

Inactive Publication Date: 2004-11-10
WUHAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcoming that proton exchange membranes cannot work effectively at high temperatures, and provide a method for preparing a proton exchange membrane composite membrane for high temperature proton exchange membrane fuel cells

Method used

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  • Process for preparing proton composite exchange membrane for high temperature proton exchange membrane fuel battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: Cut a piece of Nafion1135 film of 6cm * 6cm, then Nafion1135 film is immersed in the mixed solution of tetraethyl orthosilicate and ethanol that volume ratio is 3: 2, after stirring for 1 minute, this solution is sealed and placed, 12 Take the Nafion1135 membrane out of the sealing solution after 1 hour, blot the solution on the surface of the membrane with filter paper, then immerse it in a mixed solution of ethanol and water with a volume ratio of 2:1, take the membrane out and put it in a vacuum drying oven after 5 minutes Dry at 100°C for 12 hours to get Nafion\SiO 2 composite film. Then Nafion\SiO 2 The composite membrane was put into 3% hydrogen peroxide solution, deionized water, 0.5M sulfuric acid solution, and deionized water in sequence, boiled for 1 hour each, and then placed in deionized water for standby. The conductivity test results are shown in Table 1.

Embodiment 2

[0022] Example 2: Cut a piece of Nafion1135 film of 6cm × 6cm, then immerse the Nafion1135 film in a mixed solution of tetraethyl orthosilicate and ethanol with a volume ratio of 1:3, stir for 1 minute, and place the solution in a sealed place for 10 hours Finally, take the Nafion1135 membrane out of the sealing solution, blot the solution on the surface of the membrane with filter paper, and then immerse it in a mixed solution of ethanol and water with a volume ratio of 1:1. After 10 minutes, take the membrane out and put it in a vacuum drying oven. Dry at 100°C for 24 hours to get Nafion\SiO 2 composite film. Then Nafion\SiO 2 The composite membrane was put into 3% hydrogen peroxide solution, deionized water, 0.5M sulfuric acid solution, and deionized water in sequence, boiled for 1 hour each, and then placed in deionized water for standby. The conductivity test results are shown in Table 1.

[0023] The gas diffusion electrode was prepared by using carbon paper, polytetr...

Embodiment 3

[0026] Example 3: Cut a 6cm×6cm Nafion117 film, then immerse the Nafion117 film in a mixed solution of butyl titanate and methanol with a volume ratio of 2:1, stir for 1 minute, and place the solution in a sealed place, after 12 hours Take the Nafion117 membrane out of the sealing solution, blot the solution on the surface of the membrane with filter paper, and then immerse it in a mixed solution of methanol and water with a volume ratio of 3:2. After 10 minutes, take out the membrane and put it in a vacuum drying oven at 100 ℃ for 12 hours to get Nafion\TiO 2 composite film. Then put Nafion\TiO 2 The composite membrane was put into 3% hydrogen peroxide solution, deionized water, 0.5M sulfuric acid solution, and deionized water in sequence, boiled for 1 hour each, and then placed in deionized water for standby.

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Abstract

The invention relates to a method of preparing proton exchange compound film used for a fuel cell, a preparing method of proton exchange compound film used for a high temperature proton exchange film fuel cell, and the preparing method as follows: (1) immersing the proton exchange film into a mixed solution of oxide precursor and alcohol in a bulk ratio of 1 to 5-3 to 2, and sealing and placing at normal temperature for 10-14 hours; (2) taking the film out of the mixed solution, and blotting the solution on the film surface with filter paper; (3) immersing the film into a mixed solution of alcohol and water in a bulk ratio of 1 to 1-5 to 1 and blending for 1-30 minutes; (4) taking the film out, firstly airing at room temperature and then drying at 100 deg.C in vacuum for 6-48 hours. The product prepared has the characters of being able to effectively working at 80deg.C-140deg.C, and higher water -absorbing and -preserving abilities.

Description

technical field [0001] The invention relates to a preparation method of a proton exchange membrane composite membrane for a proton exchange membrane fuel cell. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) has become an ideal energy source for electric vehicles due to its advantages of no noise, zero pollution, no corrosion, long life, high working current, high specific power, fast cold start, etc. It can also be used as a military and civilian portable Power supply has a very broad application prospect. The proton exchange membrane is one of the key materials of the proton exchange membrane fuel cell. It can not only provide hydrogen ion channels for the electrolyte in the fuel cell, but also serve as a diaphragm to isolate the two poles of the reaction gas. At present, the working temperature of proton exchange membrane fuel cells generally needs to be controlled below 80°C. This is because when the temperature exceeds 80°C, the evaporation rat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/22H01M4/88H01M8/1051H01M8/1069
CPCY02E60/12Y02E60/522Y02E60/50
Inventor 余军潘牧袁润章沈春晖
Owner WUHAN UNIV OF TECH
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