Preparation and Performance Study of PTFE/Nafion-Zr(HPO4)2 and PTFE/Nafion-TEOS Composite Membranes

• Main Authors: Li-Chun Chen, 陳立群
• Other Authors: 余子隆
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/92322093305401014026

碩士 === 元智大學 === 化學工程學系 === 93 === PTFE/Nafion-Zr(HPO4)2 composite membranes were prepared by impregnation of PTFE/Nafion composite membranes in-situ precipitation process with zirconium phosphate , and PTFE/Nafion-TEOS composite membranes were prepared by impregnation of PTFE/Nafion composite membranes via sol-gel processing with tetraethoxysilane (TEOS). The surface of the composite membrane was investigated using SEM , AC impedance was used to measure the conductivity , thermogravimetric analysis（TGA）to characterize the thermal stability and gas chromatography(GC) the methanol permeability of membranes. Nafion 117 , PTFE/Nafion , PTFE/Nafion-Zr(HPO4)2 ,and PTFE/Nafion-TEOS composite membranes were used to prepare membrane electrode assembly (MEA) .The direct methanol fuel cell (DMFC) performances and electrochemical properties of these MEAs were investigated under various temperatures and methanol feed concentrations.