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Diproton-conductor-containing organic-inorganic composite proton exchange membrane and preparation method thereof

A proton exchange membrane and inorganic composite technology, applied in the field of organic-inorganic composite proton exchange membrane and its preparation, can solve the problem of insignificant increase in the conductivity of the proton exchange membrane, achieve good mechanical properties and thermochemical stability, and have no harmful The effect of material discharge and enhanced mechanical properties

Inactive Publication Date: 2018-08-07
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Many researchers began to try to introduce phosphonic acid into the membrane as a proton-conducting medium, but most researchers only incorporated phosphonic acid into the membrane through physical mixing, and the conductivity of the resulting proton exchange membrane was not significantly improved.

Method used

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  • Diproton-conductor-containing organic-inorganic composite proton exchange membrane and preparation method thereof
  • Diproton-conductor-containing organic-inorganic composite proton exchange membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Prepare an organic-inorganic composite proton exchange membrane containing a double proton conductor, the specific steps are as follows: first weigh 0.2g octavinyl-POSS and 0.415g vinyl phosphonic acid diethyl ester, then add to a three-necked flask containing 15mL ethanol , then add 0.01g AIBN, react at 25°C for 36h, evaporate the solvent to obtain phosphonic acid silane, and put it in an oven for use. Then weigh 1g of polyether ether ketone with a sulfonation degree of 60%, put it into a three-necked flask containing 15mL of dimethyl sulfoxide, heat it to 60°C and stir vigorously for 30min, then weigh 0.1g of phosphonic acid silane and add it to the three-necked flask at 60 Stir vigorously at ℃ for 24 hours to obtain a clear transparent sol, pour the transparent sol into a polytetrafluoroethylene film tray and age for 2 days, then move it into a 60℃ oven to dry for 24h, then raise the temperature to 80℃ and place it for 24h, take it out and cool it into membrane, and ...

Embodiment 2

[0027] Prepare an organic-inorganic composite proton exchange membrane containing a double proton conductor, the specific steps are as follows: first weigh 0.2g octavinyl-POSS and 0.415g vinyl phosphonic acid diethyl ester, then add to a three-necked flask containing 15mL ethanol , then add 0.01g AIBN, react at 30°C for 24h, evaporate the solvent to obtain phosphonic acid silane, and put it in an oven for use. Then weigh 1g of polyether ether ketone with a sulfonation degree of 60%, put it into a three-necked flask containing 15mL of dimethyl sulfoxide, heat it to 60°C and stir vigorously for 30min, then weigh 0.2g of phosphonic acid silane and add it to the three-necked flask at 60 Stir vigorously at ℃ for 24 hours to obtain a clear transparent sol, pour the transparent sol into a polytetrafluoroethylene film tray and age for 2 days, then move it into a 60℃ oven to dry for 24h, then raise the temperature to 80℃ and place it for 24h, take it out and cool it into Finally, soak ...

Embodiment 3

[0029] Prepare an organic-inorganic composite proton exchange membrane containing a double proton conductor, the specific steps are as follows: first weigh 0.2g octavinyl-POSS and 0.415g vinyl phosphonic acid diethyl ester, then add to a three-necked flask containing 15mL ethanol , then add 0.01g AIBN, react at 25°C for 30h, evaporate the solvent to obtain phosphonic acid silane, and put it in an oven for use. Then weigh 1g of polyether ether ketone with a sulfonation degree of 60%, put it into a three-necked flask containing 15mL of dimethyl sulfoxide, heat it to 60°C and stir vigorously for 30min, then weigh 0.3g of phosphonic acid silane and add it to the three-necked flask at 60 Stir vigorously at ℃ for 24 hours to obtain a clear transparent sol, pour the transparent sol into a polytetrafluoroethylene film tray and age for 2 days, then move it into a 60℃ oven to dry for 24h, then raise the temperature to 80℃ and place it for 24h, take it out and cool it into Finally, soak ...

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Abstract

The invention relates to a diproton-conductor-containing organic-inorganic composite proton exchange membrane and a preparation method thereof. The preparation method of the proton exchange membrane includes the steps: firstly, performing addition reaction on octavinyl-polyhedral oligomeric silsesquioxane and diethyl vinylphosphonate to obtain phosphoric acid silane; secondly, mixing the phosphoric acid silane and solution containing sulfonated polyetheretherketone to form a membrane by a sol-gel method; thirdly, soaking the membrane into excessive hydrochloric acid solution to perform replacement reaction to obtain the composite proton exchange membrane. According to the membrane, free radical reaction between the octavinyl-polyhedral oligomeric silsesquioxane and the diethyl vinylphosphonate is performed, so that phosphonic acid is firmly combined into the proton exchange membrane in a C-P chemical bond manner, the proton exchange membrane has good dielectric properties and optical properties by a polyhedral frame structure of the polyhedral oligomeric silsesquioxane, the sulfonated polyetheretherketone servers as a substrate material of the proton exchange membrane, the proton conductivity of the proton exchange membrane is greatly improved, and the prepared proton exchange membrane not only has excellent mechanical properties and heat chemical stability, but also has a widetemperature use range.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and relates to an organic-inorganic composite proton exchange membrane containing a double proton conductor and a preparation method thereof. Background technique [0002] At present, the proton exchange membrane that has been commercialized in the proton exchange membrane fuel cell is perfluorosulfonic acid membrane, which is expensive, and the proton conductivity is seriously affected by water. Evaporation will lead to a sharp drop in proton conductivity. Therefore, it is of great significance to develop a proton exchange membrane that can still have the ability to transfer protons under high temperature and low humidity conditions. [0003] In the search for high-temperature proton exchange membranes to replace Nafion membranes, some researchers analyzed and compared the proton conductivity of various high-temperature proton conductors (phosphonic acid and imidazole), and found that phosph...

Claims

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Application Information

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IPC IPC(8): H01M8/1041H01M8/1067H01M8/1072
CPCH01M8/1041H01M8/1067H01M8/1074Y02E60/50
Inventor 沈春晖程向泽金怀洋朱希
Owner WUHAN UNIV OF TECH
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