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Cross-linking perfluorinated sulfonic acid ion exchange membrane and preparation method thereof

A perfluorosulfonic acid ion and perfluorosulfonic acid type technology, which is applied in the direction of fuel cells, electrical components, electrochemical generators, etc., can solve the problems that it is difficult to ensure the uniformity and stability of the mechanical and mechanical properties of composite membranes

Active Publication Date: 2010-06-30
SHANDONG DONGYUE WEILAI HYDROGEN ENERGY MATERIAL CO LTD
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Problems solved by technology

However, this kind of compounding and crosslinking is only carried out on the contact surface of the two layers, and it is difficult to ensure the uniform stability of the mechanical and mechanical properties of the entire composite film.

Method used

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  • Cross-linking perfluorinated sulfonic acid ion exchange membrane and preparation method thereof
  • Cross-linking perfluorinated sulfonic acid ion exchange membrane and preparation method thereof
  • Cross-linking perfluorinated sulfonic acid ion exchange membrane and preparation method thereof

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Embodiment Construction

[0017] The ion exchange membranes used in proton exchange membrane fuel cells (PEMFC) and all-vanadium redox flow batteries (VRB) are cation exchange membranes. At present, they are mainly perfluorosulfonic acid membranes and their composite membranes. This is an ion exchange membrane with excellent performance. membrane.

[0018] The basis of the present invention is that there is no chemical bond or physical cross-linking effect between the molecules of the sulfonic acid resin layer. During the long-term operation under certain conditions, the sulfonic acid may decompose and degrade under the action of free radicals and oxidation, shortening the service life. . The invention achieves the purpose of improving the thermochemical and mechanical properties of the ion membrane under high temperature and oxidation conditions through chemical crosslinking between sulfonic acid molecules.

[0019] A kind of cross-linked perfluorosulfonic acid ion-exchange membrane of the present in...

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Abstract

The invention belongs to the field of polymer functional membrane materials, and particularly relates to an ion exchange membrane for a proton exchange membrane fuel cell (PEMFC) and a vanadium redox battery (VRB), in particular to a cross-linking perfluorinated sulfonic acid ion exchange membrane and a preparation method thereof. The method comprises the following steps: dissolving carbonyldiimidazole and perfluorinated sulfonic acid ion exchange resin into an organic solvent to prepare perfluorinated sulfonic acid solution (perfluorinated membrane casting solution); adding a cross-linking agent into the membrane casting solution, mixing well, and pouring the membrane casting solution onto the surface of a horizontal glass plate or a Hastelloy alloy steel plate, thereby preparing a cross-linking ion exchange membrane. The cross-linking perfluorinated sulfonic acid ion exchange membrane prepared in the invention has oxidation resistance, good dynamic stability and good mechanical stability, and can effectively reduce the cost of the battery and promote the commercial popularization of the battery.

Description

technical field [0001] The invention relates to an ion exchange membrane for proton exchange membrane fuel cell (PEMFC) and vanadium redox flow battery (VRB), in particular to a cross-linked perfluorosulfonic acid ion exchange membrane and a preparation method thereof, belonging to polymer function the field of membrane materials. Background technique [0002] Some energy generation systems, such as wind power generation, solar energy, etc., are affected by natural conditions such as climate change and wind force, and the electrical energy output has the characteristics of instability and discontinuity, which in turn causes a large change in mechanical power, which will make the generator output Active power and reactive power fluctuate, and the power quality of the power grid is reduced, and electric energy is wasted at the same time. At present, a new technology for wind power storage in the world - Vanadium Redox Battery (VRB) has entered the practical stage. Through eff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M2/16C08L27/18C08J3/24H01M8/1027H01M8/103H01M8/1032H01M8/1069H01M8/1072
CPCY02E60/50Y02E60/12
Inventor 张永明王学军张恒刘小宁
Owner SHANDONG DONGYUE WEILAI HYDROGEN ENERGY MATERIAL CO LTD
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