| 학회 | 한국고분자학회 |
| 학술대회 | 2004년 가을 (10/08 ~ 10/09, 경북대학교) |
| 권호 | 29권 2호, p.736 |
| 발표분야 | 연료전지와 고분자 재료 |
| 제목 | Effect of phase separated morphology on the characteristics for DMFC |
| 초록 | Fuel cell is an energy conversion device, which converts chemical energy directly into electrical energy with high efficiency and low emission of pollutants. The direct methanol fuel cell (DMFC) is a special form of low temperature fuel cell based on polymer electrolyte membrane technology. The DMFC shows considerably lower performance than that of the H2/air fuel cell because of the inefficient methanol oxidation and the crossover of the methanol through the membrane. Nafion membranes show excellent properties for polymer electrolyte membrane (PEM) in hydrogen fuel cell but they are not suitable for DMFC applications due to the high methanol permeability. To reduce the methanol crossover, Nafion membranes were modified by the sulfonated poly(arylene ether sulfone), methanol barrier. In this study, we prepare and characterize the cast membranes consisting of Nafion and sulfonated poly(arylene ether sulfone). The composite membranes were prepared by solution blend of Nafion and sulfonated poly(arylene ether sulfone) in NMP. We modulate the morphology of composite membranes by controlling the blend ratio and the degree of sulfonation of poly(arylene ether sulfone). The methanol permeability and proton conductivity of blend membranes showed lower value than that of Nafion 117 membrane. To enhance the proton conductivity, the morphology of the blend membranes will be controlled by controlling the phase separation and the blend ratio. |
| 저자 | 최지수1, 전찬웅2, 홍영택1, 김성철2 |
| 소속 | 1한국과학기술원, 2기능성고분자신소재연구센터 |
| 키워드 | DMFC; polymer electrolyte membrane; composite; Nafion; poly(arylene ether sulfone) |
