METHOD FOR FABRICATING POLYMER ELECTROLYTE COMPOSITE MEMBRANE AND POLYMER ELECTROLYTE FUEL CELL INCLUDING POLYMER ELECTROLYTE COMPOSITE MEMBRANE FABRICATED USING THE SAME

摘要

PURPOSE: A method for fabricating a polymer electrolyte composite membrane is provided to improve thermal and mechanical properties of a fuel cell and to obtain stability to a high temperature and low humidity by improving particle dispersion stability within the electrolyte composite membrane and preventing phase separation through a crosslinking bond between inorganic particles and a polymer chain. CONSTITUTION: A method for manufacturing a polymer electrolyte composite membrane comprises the following steps: preparing hydrophilic inorganic nanoparticles; synthesizing a poly(arylene ether sulfone)-based copolymer; forming a polymer solution by dissolving the poly(arylene ether sulfone)-based copolymer in an organic solvent; manufacturing a mixed solution by dispersing the inorganic nanoparticles on the polymer solution; spreading the mixed solution on a glass substrate and performing a drying process; and cross-linking the inorganic nanoparticles and the poly(arylene ether sulfone)-based copolymer within the dried mixed solution.