Organic covalent grafting-based heteropolyacid hybrid perfluorosulfonic acid membrane and preparation method and application thereof

A technology of perfluorosulfonic acid membrane and covalent grafting, which is applied in the field of heteropolyacid hybrid perfluorosulfonic acid membrane and its preparation, can solve the problems of reducing the overall conductivity of the membrane, heteropolyacid leakage, and reducing
CN113991140AActive Publication Date: 2022-01-28JILIN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JILIN UNIV
Publication Date
2022-01-28

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Abstract

The invention provides a heteropolyacid hybrid perfluorosulfonic acid membrane based on organic covalent grafting and a preparation method and application thereof, and belongs to the technical field of fuel cell proton exchange membranes. Polyethylene glycol monomethyl ether and chloromethyl trimethoxy silane are used as raw materials to prepare polyethylene glycol monomethyl ether trimethoxy silane, then a polymer chain is grafted on Keggin type vacancy heteropolyacid, and the polymer chain grafted on the heteropolyacid can interact with a sulfonate radical in a perfluorosulfonic acid membrane to form a hydrogen bond; the heteropoly acid can be stably immobilized in the perfluorosulfonic acid membrane through the acting force, so that the heteropoly acid cannot be eluted and leaked by a solvent while the conductivity of the membrane is enhanced, the problem that the heteropoly acid is difficult to be stably immobilized in the perfluorosulfonic acid membrane is solved, and the hybrid proton exchange membrane with high stability and high proton conductivity is obtained.
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Description

technical field

[0001] The invention relates to the technical field of fuel cell proton exchange membranes, in particular to a heteropolyacid hybrid perfluorosulfonic acid membrane based on organic covalent grafting and its preparation method and application. Background technique

[0002] Currently, one of the most promising clean energy devices is the proton exchange membrane fuel cell (PEMFC). The proton exchange membrane (PEM) is the "heart" of the fuel cell, which determines the power of the fuel cell. Although there are various structures of proton exchange membranes, the most widely used proton exchange membranes in proton exchange membrane fuel cells are perfluorinated membranes. The Nafion series perfluorosulfonic acid membrane produced by DuPont is the most widely used and is used as a reference for all proton exchange membranes. Compared with other membranes, Nafion membrane has higher proton conductivity value and chemical stability.

[0003] Currently, heterop...

Claims

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