Ultra-thin proton exchange membrane for fuel cell and preparation method thereof

Abstract

The invention provides an ultra-thin proton exchange membrane for a fuel cell and a preparation method thereof. The preparation method comprises the steps that 4,4-dichlorodiphenyl sulfone, 4,4-biphenol and fuming sulfuric acid are used as raw materials, and are dissolved in an N-methyl-2-pyrrolidinone solvent, anhydrous potassium carbonate is added, the temperature is risen slowly, meanwhile, toluene and vinylidene fluoride monomers are added slowly, an initiator is added after reflux temperature rise reaction, meanwhile, stirring is carried out for continuous reaction for 12h, a viscous solution is obtained, deionized water is poured into the viscous solution when the viscous solution is cooled to the room temperature, and the ultra-thin proton exchange membrane is obtained after washing, drying and tape casting. According to the ultra-thin proton exchange membrane for the fuel cell and the preparation method thereof, by adding a thin bonding layer to a sulfonated polyarylether ketone membrane, the interface adhesion between the membrane and electrodes is improved, in addition, by reducing the thickness of the membrane, the distance of proton conduction in the membrane is reduced, the proton conductivity is improved, and the defect of insufficient stability and proton conductivity of the sulfonated modified polyarylether sulfone proton exchange membrane is overcome.

Description

technical field [0001] The invention relates to the field of fuel cell materials, in particular to an ultra-thin proton exchange membrane for fuel cells and a preparation method. Background technique [0002] Since traditional fossil fuels are non-renewable and cause serious environmental pollution during use, seeking environmentally friendly renewable energy is a severe task facing mankind in the 21st century. Fuel cell (Fuel cell) is a new type of energy technology, which directly converts the chemical energy of fuel into electrical energy through electrochemical reactions. The fuel used is hydrogen-rich substances such as hydrogen, methanol and hydrocarbons, which has no pollution to the environment and has High energy efficiency and high power density, therefore, fuel cells have broad application prospects. Proton exchange membrane fuel cell (Proton Exchange Membrane Fuel Cell, PEMFC)) is following alkaline fuel cell (AFC), phosphoric acid fuel cell (PAFC), molten carbo...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the defects of poor hydrophilicity of polyaryl ether sulfone, weak oxidation resistance stability, excessive swelling after sulfonation modification, stability and proton conductivity of sulfonation modified polyarylether sulfone proton exchange membrane need to be improved, the present invention Propose an ultra-thin proton exchange membrane for fuel cells and its preparation method. The prepared proton exchange membrane has excellent proton conductivity and stability, which can reach the performance of commercial Nafion membrane