Preparation and Characterizations of the Novel Nafion/Mesoporous Silica Composite Membrane For Proton Exchange Membrane Fuel Cell

• Main Authors: Hsiu-Hsien Peng, 彭秀賢
• Other Authors: YuiWhei Chen-Yang
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/20824341591631206114

碩士 === 中原大學 === 化學研究所 === 94 === In this study, a home-made high surface area mesoprous SiO2 particles (M-AG) was used as the filler to prepare Nafion/mesoporous-silica composite membranes (M-AG-NF). The water uptake, ionic conductivity, thermal resistance and mechanical property of the as-prepared nanocomposite membrane and its application on fuel cell were studied. It was found that M-AG particles were uniformly dispersed in the Nafion matrix, resulting in a translucent film. The water uptake of the composite membrane approached to 39% which was better than that of the recast film (RNF) by 77%. The decomposition temperature of the SO3H functional group was risen from 300℃for RNF to 330℃ for M-AG/NF. At 50℃, the best conductivity of the M-AG/NF membrane (1.55x10-2S/cm) was one time higher than that of RNF membrane. With H2/O2 as the input gases, the proton exchange membrane fuel cell (PEMFC) with M-AG-3/NF membrane resulted in the maximum performance at 70℃(1060mW/cm2 for power density and 2573mA/cm2 for current density). Besides, with H2/air as the input gases, the maximum power density and the current density of the PEMEC with M-AG-3/NF composite membrane were 725mW/cm2 and 1651mA/cm2, respectively. In all, with O2 as the cathode input gas the performance of the PEMFC with M-AG-3/NF composite membrane exhibited higher power density than N115 and N212 for 64.5% and 7.2%, respectively, while, with air as cathode input gas, the power density of the PEMFC with M-AG-3/NF membrane was than that with N212 for 7.8%.