HIGH TEMPERATURE AND LOW RELATIVE HUMIDITY POLYMER/INORGANIC COMPOSITE MEMBRANES FOR PROTON EXCHANGE MEMBRANE FUEL CELLS

摘要

PEMFCs based on perfluorinated ionomer membranes (such as NAFION) are limited to temperatures below 100°C because of the critical dependence of NAFION conductivity on the stability of liquid water. Ion-conductive composite compositions provided by the present invention, ion exchange membranes including such composite compositions and fuel cells incorporating those membranes are capable of maintaining high conductivity and mechanical integrity when temperature is above 100°C.