Modified cross-linked perfluorinated ion-exchange membrane

Abstract

The invention relates to an inorganic matter-doped and reinforced fiber-modified thiotriazinone cross-linked perfluorinated ion-exchange membrane added with a high-valence metallic compound and a preparation method thereof, and belongs to the field of functional polymer composites. The ion-exchange membrane is provided with a thiotriazinone cross-linked structure and a physical cross-linked reticular structure formed by acidic groups of the thiotriazinone cross-linked structure and the high-valence metallic compound, and simultaneously, contains the reinforced fibers and inorganic matters used as assisted proton conduction matters. The ion-exchange membrane has the high high-temperature electric conductivity, good dimensional stability and mechanical strength, and particularly, has the excellent anti-medium infiltration performance.

Description

technical field [0001] The invention belongs to the field of functional polymer composite materials, and relates to a triazine ring cross-linked perfluorinated ion-exchange membrane added with high-valent metal substances and modified by reinforcing fibers and a preparation method thereof. Background technique [0002] Proton exchange membrane fuel cell is a power generation device that directly converts chemical energy into electrical energy by electrochemical means, and is considered to be the preferred clean and efficient power generation technology in the 21st century. Proton exchange membrane (proton exchange membrane, PEM) is the key material of proton exchange membrane fuel cell (proton exchange membrane fuel cell, PEMFC). [0003] Although the current perfluorosulfonic acid proton exchange membrane has been used for many years, it still has many defects that cannot meet the requirements of commercialization, such as low proton conductivity at high temperature, poor d...

AI Technical Summary

Problems solved by technology

[0009] For example, US20070031715 describes a cross-linking method in which sulfonyl chloride is cross-linked to generate sulfonyl anhydride. The sulfonyl anhydride cross-linking structure formed in this method can effectively improve the mechanical strength of the membrane, but the cross-linking structure has obvious disadvantages: The sulfonyl anhydride unit is unstable to bases

And the gas permeability of the membrane also increases, which has a very serious impact on the performance of the fuel cell

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