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A kind of fluorine-containing ion exchange membrane for fuel cell and preparation method thereof

An ion exchange membrane and fuel cell technology, which is applied in the field of fluorine-containing ion exchange membrane for fuel cell and its preparation, can solve the problems of reducing the molecular weight of resin and affecting the mechanical properties of the membrane, etc.

Active Publication Date: 2019-05-28
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

In order to improve the ion exchange capacity (Ion Exchange Capacity, IEC) of perfluorosulfonic acid resin, it is often necessary to increase the ratio of perfluorosulfonic acid vinyl ether monomer and tetrafluoroethylene monomer, but this will reduce the molecular weight of the resin and affect the membrane mechanical properties

Method used

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  • A kind of fluorine-containing ion exchange membrane for fuel cell and preparation method thereof
  • A kind of fluorine-containing ion exchange membrane for fuel cell and preparation method thereof
  • A kind of fluorine-containing ion exchange membrane for fuel cell and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The present embodiment grafts 1-vinylimidazole with ATRP method, and the specific implementation steps are as follows:

[0029] (a) Disperse the long-chain perfluorinated ion exchange resin (n=1, p=2, EW=900 g / mmol) in an aqueous solution of n-propanol (the mass ratio of n-propanol to water is 1:1), The resin concentration is 10wt%, and the solution mass is 100g.

[0030] (b) Weigh 10 g of 1-vinylimidazole monomer and 0.6 g of 2,2'-bipyridine ligand into the solution prepared in (a).

[0031] (c) Deoxidize the solution in (b), quickly add 0.1 g of CuBr catalyst, and deoxidize to less than 5 ppm by freezing and pumping in liquid nitrogen.

[0032] (d) The solution in (c) was reacted at 80°C.

[0033] (e) The solution after the reaction in (d) is subjected to ion exchange, dialysis, and drying to obtain a film-forming resin.

[0034](f) Disperse the film-forming resin in (e) into an aqueous solution of ethanol (solid content of 5 to 50%), and add a certain amount of ma...

Embodiment 2

[0038] In the present embodiment, 4-vinylbenzo-18-crown-6 monomer is grafted on perfluorosulfonic acid resin by ATRP method, and the specific implementation steps are as follows:

[0039] (a) A short-chain perfluorosulfonic acid ion exchange resin (n=0, p=2, EW=800 g / mmol) was dispersed in DMF, the resin concentration was 10 wt%, and the solution mass was 100 g.

[0040] (b) Weigh 10 g of 4-vinylbenzo-18-crown-6 monomer and 0.6 g of 2,2'-bipyridine ligand into the solution prepared in (a).

[0041] (c) Deoxidize the solution in (b), quickly add 0.1 g of CuBr catalyst, and deoxidize to less than 5 ppm by freezing and pumping in liquid nitrogen.

[0042] (d) The solution in (c) was reacted at 80°C.

[0043] (e) The solution after the reaction in (d) is subjected to ion exchange, dialysis, and drying to obtain a film-forming resin.

[0044] (f) Disperse the film-forming resin in (e) into an aqueous solution of ethanol (solid content of 5-50%), and add a certain amount of lantha...

Embodiment 3

[0046] In this example, methyl 4-[2,4-(5-methyl-2-benzoxazolyl)phenyl]vinylbenzoate monomer was grafted on perfluorosulfonic acid resin by ATRP method, and the specific implementation was carried out. Proceed as follows:

[0047] (a) A long-chain perfluorosulfonic acid resin (n=1, p=2, EW=900 g / mmol) was dispersed in DMSO, the resin concentration was 5 wt %, and the solution mass was 100 g.

[0048] (b) Weigh out 30 g of methyl 4-[2,4-(5-methyl-2-benzoxazolyl)phenyl]vinylbenzoate monomer and 0.6 g of 2,2'-bipyridine The ligand is added to the solution prepared in (a).

[0049] (c) Deoxidize the solution in (b), quickly add 0.1 g of CuBr catalyst, and deoxidize to less than 5 ppm by freezing and pumping in liquid nitrogen.

[0050] (d) The solution in (c) was reacted at 80°C.

[0051] (e) The solution after the reaction in (d) is subjected to ion exchange, dialysis, and drying to obtain a film-forming resin.

[0052] (f) Disperse the film-forming resin in (e) into an aqueou...

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Abstract

The invention belongs to the field of functional polymer composite materials, and in particular relates to a fluorine-containing ion exchange membrane for a fuel cell and a preparation method thereof. A fluorine-containing ion exchange membrane for a fuel cell, the film-forming resin of the membrane has a perfluorinated main chain, and the side chain contains a plurality of functional groups, at least one of which has an ion exchange function; the membrane contains free radicals The transition metal element that eliminates the effect, the transition metal element forms a complex bond with the functional group on the side chain. The functional groups on the side chains of the film-forming resin of the present invention improve the high-temperature conductivity and elastic modulus of the proton exchange membrane and reduce the H2 transmittance through hydrogen bonds and electrostatic interactions between the functional groups; in addition, the functional groups have a complexing effect , form complexes with transition metal ions that have the effect of eliminating free radicals, so as to ensure that these functional materials do not lose during the entire process.

Description

technical field [0001] The invention belongs to the field of functional polymer composite materials, and in particular relates to a fluorine-containing ion exchange membrane for fuel cells and a preparation method thereof. Background technique [0002] Today's world is facing problems such as increasing environmental pollution, rising global temperature, and depletion of oil resources. In order to protect our homeland and achieve sustainable development, it is imperative to develop new energy sources. Proton exchange membrane fuel cell (PEMFC), as one of the new energy resources, is an energy conversion device that converts chemical energy into electrical energy. It is a green and efficient power generation technology, especially in automobiles. The application of the industry is considered to be the ultimate state of new energy vehicles. Proton exchange membrane (PEM), as one of the key materials of PEMFC, determines the performance of PEMFC. Inside the fuel cell, the pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/1039H01M8/1081H01M8/1088C08F261/06C08F226/06C08F212/14C08F220/32
CPCH01M8/1039H01M8/1081H01M8/1088C08F261/06C08F2438/01C08F220/325C08F212/14Y02E60/50
Inventor 唐军柯闫先明杜鹃孔亮刘威曹原
Owner SHANDONG DONGYUE WEILAI HYDROGEN ENERGY MATERIAL CO LTD
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