| 학회 |
한국고분자학회 |
| 학술대회 |
2005년 가을 (10/13 ~ 10/14, 제주 ICC) |
| 권호 |
30권 2호 |
| 발표분야 |
복합재료 |
| 제목 |
α-Zirconium Phosphate/Nafion Nanocomposite Electrolyte Membranes for Direct Methanol Fuel Cells |
| 초록 |
The crucial problem to higher efficiency of direct methanol fuel cells (DMFCs) is methanol crossover of Nafion® membrane. α-Zirconium phosphate (α-ZrP) which is layered inorganic particle having a high proton conductivity has been synthesized and introduced to reduce the methanol crossover of Nafion. Exfoliated α-ZrP in water can be obtained with ultra-sonication and basic surfactant (tetrabutylammonium hydroxide, TBA+OH-). Polyallylamine as linking agent is used to render ionic bonding with acidic functional sites of α-ZrP and Nafion. A novel α-ZrP/Nafion nanocomposite electrolyte membrane was fabricated by coating the α-ZrP/Nafion solution on Nafion® 117 membrane. By using X-ray diffraction (XRD) and transmission electron microscopy (TEM), it was found that exfoliated α-ZrP was well-dispersed in Nafion matrix. Scanning electron microscopy (SEM) measurements and energy dispersive X-ray analysis (EDX) indicated that α-ZrP sheets exist in the nanocomposite layers which have uniform thickness and good adhesion with Nafion® 117 membrane. Thermogravimetric analysis is used to quantify and optimize the content of α-ZrP in nanocomposite membrane for performance as electrolyte membrane. There was a significant decreases in methanol permeability of the nanocomposite electrolyte membrane compared with Nafion® 117 membrane, while the proton conductivity of that was slightly less than that for Nafion® 117 membrane. |
| 저자 |
소주희, 이승우, 하봉우, 차국헌
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| 소속 |
서울대 |
| 키워드 |
direct methanol fuel cell; methanol crossover; α-zirconium phosphate; nanocomposite membrane
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| E-Mail |
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