Cross-linked poly(triazole) ion liquid/polybenzimidazole high-temperature proton exchange membrane and preparation method thereof

Abstract

The invention discloses a cross-linked poly(triazole) ion liquid / polybenzimidazole high-temperature proton exchange membrane and a preparation method thereof. The cross-linked membrane adopts polybenzimidazole as a polymer skeleton, adopts triazole ion liquid-based polyethylene as a cross-linking agent, and the cross-linked high-temperature proton exchange membrane is formed by virtue of self cross linking. The cross-linked poly(triazole) ion liquid / polybenzimidazole high-temperature proton exchange membrane proposed by the invention has good proton electric conductivity and excellent size stability in a case of not increasing the humidity, and the weaknesses of the polybenzimidazole / phosphate high-temperature membrane such as unstable electric conductivity caused by the loss of phosphoric acid can be effectively avoided. The cross-linked poly(triazole) ion liquid / polybenzimidazole high-temperature proton exchange membrane has the advantages of high electric conductivity, low air permeability and the like. The cross-linked poly(triazole) ion liquid / polybenzimidazole high-temperature proton exchange membrane proposed by the invention can be applied to a high-temperature proton exchange membrane fuel cell, a direct alcohol fuel cell, an electrochemical sensor or other electrochemical apparatuses.

Description

technical field

[0001] The invention belongs to the technical field of fuel cell materials, and in particular relates to a cross-linked polytriazole ionic liquid / polybenzimidazole high-temperature proton exchange membrane and a preparation method thereof. Background technique

[0002] Proton exchange membrane fuel cell (PEMFC) is a high-efficiency, clean and environment-friendly power generation device. It is an ideal power source for electric vehicles. application prospects. However, perfluorinated sulfonic acid membrane fuel cells represented by Nafion® are widely used at present, but the proton conductivity of this type of proton exchange membrane is greatly affected by the water content and temperature in the membrane, and the alcohol resistance performance is poor. The working temperature cannot exceed 80°C. Because PEMFC is limited by the operating temperature, it faces problems such as poor CO tolerance and difficult water and heat management of the system in practi...

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