SPE membrane electrode and its application to chemical sensor

The structure and proton conducting mechanism of solid polymer electrolyte (SPE) are described. Since the conductivity of electrolyte is important in SPE electrochemical cell research and development, we investigate quantitat ively the conductivity of Nafion membrane and its dependence on temperature and relative humidity. Experimental results show that the conductivity of Nafion membrane increases with temperature and relative humidity. We also r eports on the preparation and development of SPE membrane electrode with th e emphasis on the mixture pressing method and impregnation-reduction proces s to prepare SPE composite electrode assemblies and their application to el ectrochemical sensors. We also investigate and fabricate a potentiometric e lectrochemical sensor of hydrogen and ethylene to measure the hydrogen and ethylene partial pressure.