Organic phosphoric acid-based high-temperature proton exchange membrane and preparation method and application thereof

Abstract

The invention discloses an organic phosphoric acid-based high-temperature proton exchange membrane, and provides preparation and application of the proton exchange membrane. The proton exchange membrane is prepared by doping an organic phosphoric acid into a macromolecular polymer. The organic phosphoric acid is used for substituting a phosphoric acid and is used for the high-temperature proton exchange membrane, an organic molecular chain segment in the organic phosphoric acid can be suspended on a macromolecular chain so as to limit the moving of the organic phosphoric acid in the proton exchange membrane, the problem of serious phosphoric acid runaway is solved, and the high-temperature proton exchange membrane with favorable cycle property is obtained. The types of the organic phosphoric acid, the doping quantity and the types of macromolecule have great selection ranges so as to obtain the high-temperature proton exchange membrane with excellent performance; moreover, the organicphosphoric acid is various in types and high in selectivity; and by low-cost engineering plastic and biopolymer, the high-temperature proton exchange membrane can be widely commercialized.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, in particular relates to a proton exchange membrane based on organic phosphonic acid, and provides the preparation and application of the proton exchange membrane. Background technique [0002] Proton exchange membrane fuel cells (PEMFCs) are an ideal primary energy conversion device that directly converts the chemical energy generated by the reaction of fuel and oxidant into electrical energy. It has the advantages of simple structure, good safety, high energy conversion rate, low environmental pollution, and low noise. Features. The proton exchange membrane is one of the two core materials of PEMFCs. It plays an important role in blocking fuel gas and oxygen or air, conducting protons, and attaching electrocatalysts. It is the main determinant of the service behavior of PEMFCs. In recent years, more and more researchers have turned to proton exchange membranes with good environment, low cos...

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Problems solved by technology

[0004] The polybenzimidazole / phosphoric acid proton exchange membrane is a type of high-temperature proton exchange membrane that has been commercially used. The biggest problem with this type of high-temperature proton exchange membrane is that phosphoric acid is gradually lost during the battery cycle as the water generated by the battery reaction is discharged. , so that the performance of the battery gradually decreases

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