| 학회 |
한국고분자학회 |
| 학술대회 |
2003년 봄 (04/11 ~ 04/12, 연세대학교) |
| 권호 |
28권 1호, p.278 |
| 발표분야 |
분자전자 부문위원회 |
| 제목 |
Nafion/MMT Clay Nanocomposite Membranes for Direct Methanol Fuel Cells |
| 초록 |
We prepared Nafion/clay nanocomposite membranes to reduce methanol permeability while maintaining essential proton conductivity. Chemically treated clays were ultrasonifically dispersed in Nafion/DMA solution, and exfoliated during solvent casting at 100℃. Featureless diffraction pattern of Nafion/clay nanocomposite indicated disordered exfoliated composite structure. TEMicrographs also showed layers were exfoliated by well dispersed in nanolayer in Nafion® resin. It was confirmed that nano-dispersed clay improved both tensile strength and elongation at break. Reflective index measurement indicated that methanol permeability of Nafion®117 was ca. 6x10-5 mol/cm2․s while that of 3 wt% Nafion/clay nanocomposite membrane (～50 ㎛) decreased down to the order of 10-7 mol/cm2․s. Platinum black catalysts were sprayed on carbon paper for the fabrication of MEA. Unit cell (6 cm2) performance was tested using 2M-MeOH and O2. Nafion 117 membranes reached 250 mA/cm2 (at 0.5 V, 70℃) but nanocomposite membranes reached about 250 mA/cm2 at the same condition.
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| 저자 |
박승배;김영택;송민규;이희우 |
| 소속 |
서강대 |
| 키워드 |
fuel cell; DMFC; nanocomposite; clay
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| E-Mail |
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