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Proton exchange membrane as well as preparation method and application thereof

A proton exchange membrane, ion exchange technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve problems such as inability to meet actual operation, installation needs, degradation of mechanical properties, easy to rupture, etc.

Active Publication Date: 2013-09-25
SHANDONG DONGYUE WEILAI HYDROGEN ENERGY MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The disadvantage is that simply adding the above substances often deteriorates the mechanical properties of the membrane, which cannot meet the needs of actual operation and installation.
The addition of auxiliary proton-conducting substances often causes the membrane to become brittle and easy to break, and the mechanical properties are greatly reduced

Method used

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  • Proton exchange membrane as well as preparation method and application thereof
  • Proton exchange membrane as well as preparation method and application thereof
  • Proton exchange membrane as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0124] This example is used to illustrate the proton exchange membrane provided by the present invention and its preparation method. Convert the repeating unit to

[0125] Perfluorinated ion exchange resin with EW=1000 and cerous carbonate (weight ratio to resin: 1:100), Zr(HPO with a particle size of 0.005 μm) 4 ) 2 (The weight ratio with the resin is 3:100) to prepare a 5% by weight propanol aqueous solution. Then a DMF solution of perfluoromalonyl peroxide with a concentration of 5% by weight was prepared.

[0126] Take a substrate with a thickness of 30 μm and a porosity of 70% (wherein h=0, i=2, A=OH) carry out the polytetrafluoroethylene microporous membrane of surface modification, be placed in above-mentioned solution and soak for about 1 hour, then the soaked membrane is dried on the heating plate, meanwhile Roll the film with a rubber roller. Above-mentioned solution is poured in the polytetrafluoroethylene casting mold that places horizontally, through 80 ℃ ...

Embodiment 2

[0128] This example is used to illustrate the proton exchange membrane provided by the present invention and its preparation method.

[0129] Convert the repeating unit to Perfluorinated ion exchange resin with EW=800 and SiO with a particle size of 0.03 μm 2 (The weight ratio of the resin to the resin is 5:100), the surface is covered with (where h=0, i=4, A=ONa) modified polyperfluoroethylene propylene fibers (diameter 0.05 μm, length 5 μm, weight ratio to resin 1:40) were mixed and extruded to obtain a film with a thickness of 30 μm.

[0130] take (where h=0, i=4, A=ONa) the porous hexafluoropropylene membrane with a thickness of 12 μm and the above-mentioned 30 μm membrane are heat-pressed together under vacuum at 260° C., and then heated in a vacuum oven at 150° C. Soak in NH for 1 hour 4 Cl in DMF for 5 hours. The soaked membrane was then placed in triethylamine at 200 °C for 2 hours to obtain a cross-linked membrane. The membrane was sequentially treated with K...

Embodiment 3

[0135] This example is used to illustrate the proton exchange membrane provided by the present invention and its preparation method.

[0136] Convert the repeating unit to

[0137] Perfluorinated ion exchange resin with EW=1100, lanthanum acetate (weight ratio to resin is 0.001:100) and Ce(HPO 4 ) 2 (the weight ratio to the resin is 0.001:100) to prepare a solution with a resin content of 3% by weight (the solvent is water and ethanol at a weight ratio of 1:1). surface will be (wherein, l=1, D=H) the grafted porous polytetrafluoroethylene-hexafluoropropylene film is immersed in the above solution, and after 30 minutes, the film is taken out and dried, and then the film is cross-linked by 50KGy radiation to obtain a thickness of 10 μm The cross-linked structure is (I) kind of ionic membrane (4# membrane).

[0138] Convert the repeating unit to Perfluorinated ion-exchange resin with EW=940, Ce(III)-DMSO complex (weight ratio to resin is 0.1:100) and H 3 PW 12 o 40 (T...

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Abstract

The invention provides a proton exchange membrane as well as a preparation method thereof and application thereof in a proton exchange membrane fuel cell. The proton exchange membrane comprises 2-40 single-layer membranes taking perfluoro ion exchange resins as substrates, wherein at least one single-layer membrane is in a crosslinking reticulate structure, at least one single-layer membrane contains auxiliary proton conducting substances with surfaces modified, at least one single-layer membrane contains high-valent metallic compounds, and at least one single-layer membrane is a modified microporous membrane. The proton exchange membrane improves the proton conducting property and also greatly enhances the mechanical strength of ionic membranes in a way of physical bonding crosslinking formed by the modified microporous membrane, chemical bonding crosslinking, the high-valent metallic compounds and acidic exchange radicals.

Description

technical field [0001] The invention relates to a proton exchange membrane and its preparation method and application. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is a power generation device that directly converts chemical energy into electrical energy by electrochemical means, and is considered to be the preferred clean and efficient power generation technology in the 21st century. Proton exchange membrane (proton exchange membrane, PEM) is the key material of proton exchange membrane fuel cell. [0003] The currently used perfluorosulfonic acid proton exchange membrane has good proton conductivity at low temperature (not higher than 80°C) and high humidity, but there are also many shortcomings, such as poor dimensional stability and low mechanical strength , Poor chemical stability, etc. [0004] The water absorption rate of the membrane and the size expansion caused by water absorption are different under different humidity. When the membra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/32H01M8/02H01M2/16C08L27/12C08L27/18C08L27/20B01D67/00H01M8/1048
CPCY02E60/12Y02E60/50
Inventor 张永明唐军柯刘萍张恒王军
Owner SHANDONG DONGYUE WEILAI HYDROGEN ENERGY MATERIAL CO LTD
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