Preparation method of polymer matrix proton exchange membrane (PEM) with cross-linked structure

A technology of proton exchange membrane and cross-linked structure, which is applied to structural parts, fuel cell parts, battery pack parts, etc., can solve the problem of high requirements for film forming conditions, poor controllability of sulfonation degree and sulfonation position , easy to cause pollution and other problems, to achieve the effect of reducing methanol permeability, high proton conductivity, and improving stability
CN102775628AActive Publication Date: 2012-11-14BEIJING UNIV OF CHEM TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING UNIV OF CHEM TECH
Publication Date
2012-11-14

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Abstract

The invention relates to a preparation method of a polymer matrix proton exchange membrane (PEM) with a cross-linked structure, belonging to the field of battery electrolyte materials. The PEM is prepared by carrying out mechanical blending dispersion on matrix polymer material, unsaturated metal organic sulfonate, peroxide and auxiliary crosslinking agent, carrying out reaction in situ at the temperature of 140-200 DEG C, treating the product of the reaction by deionized water and sulfuric acid solution, and drying; and the PEM comprises the components in parts by weight: (1) 100 parts of matrix polymer material, (2) 20-150 parts of unsaturated metal organic sulfonate, (3) 1-20 parts of peroxide and (4) 0-5 parts of auxiliary crosslinking agent. In the molding process, organic solvent is not needed; and the preparation method is simple, high in efficiency, environment-friendly and low in cost. The prepared PEM has the proton conductivity approximate to Nafion (reaching up to the order of magnitude of 10<-2> / cm) and the methanol permeability coefficient far less than Nafion at the temperature of 20-80 DEG C, thus meeting the using requirement of a direct methanoi fuel cell.
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Description

(1) Technical field:

[0001] The invention relates to a method for preparing a polymer matrix proton exchange membrane with a crosslinked structure, belonging to the field of battery electrolyte materials. (two) background technology:

[0002] Proton exchange membrane (PEM) is one of the key components of direct methanol fuel cells, which is responsible for the dual functions of conducting protons and blocking fuel and air, and its performance is critical to the output performance of the battery. At present, the most representative ones are the Nafion series products produced by DuPont Company of the United States, which have high electrical conductivity, proton exchange capacity and outstanding chemical stability, but problems such as high price, low working temperature and high methanol permeability restrict their commercial use. application and promotion. Therefore, the development of PEM with simple process, low price and excellent performance has become a hot spot and m...

Claims

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