Nano cerium oxide-modified sulfonated polyphenylene sulfide proton exchange membrane and preparation method thereof

The invention relates to a nano cerium oxide-modified sulfonated polyphenylene sulfide proton exchange membrane and a preparation method thereof. The proton exchange membrane comprises the following components by mass percent: 82.5-99.9% of stable protein plasma solution (SPPS) of which the sulfonation degree is 57-80%, and 0.1-17.5% of nano CeO2 powder. The method disclosed by the invention comprises the following steps: with the SPPS as a base body and rare-earth metal oxide nano CeO2 as a filling phase, preparing an evenly mixed membrane casting solution, and then adopting a curtain coating or pressing and film-forming method to prepare an inorganic-organic composite film in a drying manner. The proton exchange membrane is low in preparation cost; the prepared SPPS/CeO2 proton exchange membrane is high in conductivity, and excellent in methanol permeability; the conductivity at 40-110 DEG C is 8.0*10-1.8*10 S/cm; the alcohol resistance coefficient reaches 1.1*10-6.6*10cm /s; the water absor