Thermal Properties and Conductivity of Nafion-Zirconia Composite Membrane

The application of composite membranes for high temperature polymer electrolyte membrane fuel cell has attracted interests. Nafion-metal dioxide composite membranes are considered among the research niche. In this study, Nafion membranes and Nafion-zirconia composite membranes with 1, 3 and 5 wt. % of hydrous zirconia were prepared accordingly. All membranes were characterized by quantitative analysis techniques such as thermogravimetry analyse, diffraction scanning calorimetry and Fourier transform infrared. All composite membranes showed high glass transition temperatures and improved water retention properties, compared to the Nafion membrane. The composite membrane with 3 wt. % of zirconia showed the highest thermal resistance at 90 degree Celcius. (author)