| Summary: | 碩士 === 元智大學 === 化學工程與材料科學學系 === 97 === This thesis used methanol/H2O (4/1 g/g) and ethanol/H2O (4/1 g/g) mixed solutions to dissolve Nafion solid respectively. Nafion membranes were prepared by ” solutions casting ”；and isopropanol/H2O (4/1 g/g) mixed solution, N,N’-dimethylacetamide (DMAc) and N,N’-dimethyl -formamide (DMF) solvent were mixed Nafion solid, Pt catalyst and Pt-C (Pt on carbon powder support) to preparing catalyst ink solution. The above-mentioned Nafion membranes and catalyst ink solution were prepared for membrane electrode assemblies (MEA). Membrane electrode assemblies structures included, (a) convention GDL-Pt/C -membrane-Pt/C-GDL five-layers structure, (b) GDL-Pt-Pt/C-membrane -Pt/C-Pt-GDL seven-layers structure, (c) GDL-Pt/C-Pt-membrane-Pt -Pt/C-GDL seven- layers structure, (d) GDL-Pt-Pt/C-Pt-membrane-Pt- Pt/C-Pt-GDL nine- layers structure. The MEA single cell i-V curve data, and impedance data showed that proton conduction of Nafion membrane which were prepared by methanol/H2O and ethanol/H2O solutions casting was lower than Nafion-212 membrane which were prepared by Du Pont Co..The MEA of structures (c) and (d) had much better fuel cells performances than structures (a) and (b).
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