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Fuel cell proton exchange membranes and preparation method thereof

A proton exchange membrane and fuel cell technology, applied in fuel cells, fuel cell parts, battery pack parts, etc., can solve the problems of unpublished applications, etc., and achieve the effects of low cost, easy preparation and good chemical stability

Inactive Publication Date: 2011-07-27
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this patent, the application of related materials as proton exchange membranes is not announced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] According to the synthetic steps synthetic ionic liquid The specific synthesis steps are as follows: slowly add AMPS into slightly excess methylimidazole, stir overnight, then wash with anhydrous ether, and remove the solvent by rotary evaporation to obtain the ionic liquid. Mix 0.27-0.30g of ionic liquid, 0.63-0.70g of styrene, 0.09g of divinylbenzene, and 0.02g of benzoin ethyl ether, mix them evenly, drop them on a glass plate, and cover a glass plate on it, and ultraviolet light triggers 20min, in situ polymerization to form a film. Soak the membrane in dilute hydrochloric acid for 24 hours to prepare the proton exchange membrane for fuel cell. The proton conductivity of the proton exchange membrane at room temperature is 5×10 -4 S cm -1 , the methanol permeability is 2×10 -7 cm 2 the s -1 , the storage modulus is 3200MPa.

Embodiment 2

[0028] According to the synthetic steps synthetic ionic liquid 0.13~0.15g, 0.06~0.10g styrene, 0.02g divinylbenzene, 0.004g benzoin ethyl ether, mix them evenly, drop them on a glass plate, cover a glass plate on it, and trigger it with ultraviolet light for 25min, the original Polymerization into film. Soak the membrane in dilute hydrochloric acid for 24 hours to prepare the proton exchange membrane for fuel cell. The proton conductivity of the proton exchange membrane at room temperature is 4×10 -3 S cm -1 , the methanol permeability is 2×10 -6 cm 2 the s -1 , the storage modulus is 2850MPa.

Embodiment 3

[0030] 0.27~0.30g, 0.63~0.65g acrylonitrile, 0.09g divinylbenzene, 0.02g, mix it evenly, drop it on a glass plate, and then cover it with a glass plate, trigger it with ultraviolet light for 15 minutes, and polymerize in situ to form a film. Soak the membrane in dilute hydrochloric acid for 24 hours to prepare the proton exchange membrane for fuel cell. The proton conductivity of the proton exchange membrane at room temperature is 5×10 -4 S cm -1 , the methanol permeability is 3×10 -7 cm 2 the s -1 , the storage modulus is 3000MPa.

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Abstract

The invention belongs to the field of high polymer materials and relates to fuel cell parts and a preparation method thereof, in particular to a preparation method of fuel cell proton exchange membranes. The preparation method comprises: neutralizing AMPS with an alkali to prepare polymerizable ionic liquid; mixing the polymerizable ionic liquid, a polymerizable monomer and a crosslinker in a weight ratio of 1-7:3-9:1-2; and adding an initiator and polymerizing the polymerizable monomer by using an in-situ polymerization method to obtain a series of novel polymer proton exchange membranes used for fuel cells. In the invention, the polymer membranes prepared by polymerization is soaked in acid (such as diluted hydrochloric acid, diluted sulphuric acid, diluted nitric acid and acetic acid),so that AMPS ionic liquid is changed into AMPS in an acidic state again. The proton exchange membranes prepared by the method have the advantages of high conductivity, low price, easy preparation, high thermal stability, high chemical stability and low cost; and meanwhile, the performance, such as mechanical performance, conductivity, methanol permeability and chemical and thermal stability, of the polymer proton exchange membranes can be regulated by changing the crosslinker content of the polymer proton exchange membranes.

Description

technical field [0001] The invention belongs to the field of polymer materials, and relates to a fuel cell component and a preparation method thereof, in particular to a preparation method of a fuel cell proton exchange membrane. Background technique [0002] The proton exchange membrane is the core component of the fuel cell. The proton exchange membrane is not only a diaphragm material, but also a substrate for an electrode active material (electrocatalyst), and a selective membrane. The quality of its performance directly affects the working performance of the fuel cell. [0003] The currently commonly used proton exchange membranes are the Nafion series membranes developed by DuPont. It is a perfluoropolymer membrane. Due to the high methanol permeability of the Nafion membrane, the efficiency of the entire battery is reduced; at the same time, its cost is high. [0004] 2-acrylamido-2-methylpropanesulfonic acid (AMPS), because of its polymerizable vinyl group and hy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F212/08C08F212/36C08F220/60C08F220/48C08F212/14C08F216/06C08F226/10C08F220/50C08F220/18C08F220/14C08J5/22C08J7/14H01M8/02H01M2/16H01M8/1018H01M8/1069
CPCY02E60/50
Inventor 严锋刁含斌
Owner SUZHOU UNIV