This research was carried out to prepare high performance membrane-electrode assembly for proton exchange membrane fuel cell at low humidity condition. It had investigated the effect of the Nafion®/PTFE proton exchange membrane, impregnating porous PTFE membrane with Nafion® solution, in the gas diffusion medium and microporous layer on the cell performance under various humidity conditions. The Nafion®/PTFE decreases the back diffusion distance of product water from cathode to anode side at low humidity condition, caused by the property of high tensile strength. It is found that the optimum PTFE content is 40wt% of the gas diffusion medium and 30wt% of the microporous layer at low humidity condition, respectively. The optimum PTFE treatment in the two layers can facilitate the reactant gas and the back diffusion of product water from cathode side to anode side to provide sufficient proton conductivity of membrane. The highest current density was 955mA/cm2 occurred at the cell potential of 0.6V.
|頁（從 - 到）||945-951|
|期刊||Journal of the Taiwan Institute of Chemical Engineers|
|出版狀態||Published - 2011 11月 1|
All Science Journal Classification (ASJC) codes
- 化學 (全部)
- 化學工程 (全部)