High-temperature proton exchange membrane in porous hydrogel base as well as preparation method and application of membrane

Abstract

The invention provides a high-temperature proton exchange membrane in a porous hydrogel base as well as a preparation method and an application of the membrane. The preparation method of the high-temperature proton exchange membrane comprises the following steps of: automatically-polymerizing a hydrophilic monomer or enabling the hydrophilic monomer and a hydrophilic macromolecule to form a (semi) interpenetrating network structure hydrogel film; swelling the (semi) interpenetrating network structure hydrogel film by adsorbing deionized water; and adsorbing a proton conductor aqueous solution through vacuum-freezing and drying to obtain the high-temperature proton exchange membrane in the porous hydrogel base, wherein the proton conductivity of the prepared proton exchange membrane in the porous hydrogel base can reach 0.1S.cm<-1> to 0.15S.cm<-1>. The preparation method disclosed by the invention is better than the conventional preparation method for the proton exchange membrane doped with a proton conductor, and capable of adsorbing the proton conductor to the three-dimensional network structure of the hydrogel film and firmly sealing the proton conductor by utilizing the porous structure, the swelling property, the unique adsorption and the retainability of the hydrogel film. The high-temperature proton exchange membrane in the porous hydrogel base is large in proton conductor adsorbing capacity, high in proton conductivity, wide in operation temperature range, simple and easy in preparation method, low in cost and large in improvement space.

Description

technical field [0001] The invention belongs to the field of new material technology and new preparation technology, and specifically relates to a novel porous hydrogel-based medium-high temperature proton exchange membrane and its preparation method and application. Background technique [0002] Proton exchange membrane is a solid polymer electrolyte membrane with good proton conductivity, used to transport protons. Proton exchange membrane is a kind of proton conductive film formed by swelling, sulfonation or compounding with proton conductor by polymer or polymer composite. [0003] Proton exchange membranes originated from polyphenylene sulfonic acid membranes produced by GE in the early 1960s, but their stability and conductivity were poor, and they were soon replaced by Nafion membranes developed by DuPont. Due to the high price of Nafion membrane, low platinum catalyst activity caused by low operating temperature, and low battery output power, Nafion-based proton exc...

AI Technical Summary

Problems solved by technology

But limited by the salt tolerance and adsorption of hydrogel materials, the proton conductivity of the prepared hydrogel-based proton exchange membrane is 0.02-0.09 S cm at 180 °C and anhydrous environment -1 , still unable to meet the 0.1 S cm required for commercial production -1 standard