Journal of the Korean Electrochemical Society (전기화학회지)

The Korean Electrochemical Society (한국전기화학회)
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Characterization and Performance of MEA for Direct Methanol Fuel Cell Prepared with PFA Grafted Polystyrene Membranes via Radiation-Grafting Method

방사선 그라프트 PFA-폴리스티렌 멤브레인으로 제조한 직접 메탄올 연료전지용 MEA의 성능과 특성

  • Kang, Se-Goo (Fuel Cell Research Center, Korea Institute of Energy Research) ;
  • Peck, Dong-Hyun (Fuel Cell Research Center, Korea Institute of Energy Research) ;
  • Kim, Sang-Kyung (Fuel Cell Research Center, Korea Institute of Energy Research) ;
  • Lim, Seong-Yop (Fuel Cell Research Center, Korea Institute of Energy Research) ;
  • Jung, Doo-Hwan (Fuel Cell Research Center, Korea Institute of Energy Research) ;
  • Park, Young-Chul (Fuel Cell Research Center, Korea Institute of Energy Research) ;
  • Shin, Jun-Hwa (Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute) ;
  • Kang, Phil-Hyun (Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute) ;
  • Nho, Young-Chang (Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute) ;
  • Shul, Yong-Gun (Department of Chemical and Biomolecular Engineering, Yonsei University)
  • 강세구 (한국에너지기술연구원 연료전지연구단) ;
  • 백동현 (한국에너지기술연구원 연료전지연구단) ;
  • 김상경 (한국에너지기술연구원 연료전지연구단) ;
  • 임성엽 (한국에너지기술연구원 연료전지연구단) ;
  • 정두환 (한국에너지기술연구원 연료전지연구단) ;
  • 박영철 (한국에너지기술연구원 연료전지연구단) ;
  • 신준화 (한국원자력연구원 정읍방사선과학연구소 방사선공업환경연구부) ;
  • 강필현 (한국원자력연구원 정읍방사선과학연구소 방사선공업환경연구부) ;
  • 노영창 (한국원자력연구원 정읍방사선과학연구소 방사선공업환경연구부) ;
  • 설용건 (연세대학교 화공생명공학과)
  • Published : 2009.05.30
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Abstract

In order to develop a novel polymer electrolyte membrane for direct methanol fuel cell (DMFC), styrene monomer was graft-polymerized into poly(tetrafluoroethylene perfluoropropyl vinyl ether) (PFA) film followed by a sulfonation reaction. The graft polymerization was prepared by the $\Upsilon$-ray radiation-grafting method. Subsequently, sulfonation of the radiation-grafted film was carried out in a chlorosulfonic acid/1,2-dichloroethane (2 v/v%) solution. The chemical, physical, electrochemical and morphological properties of the radiation-grafted membranes (PFA-g-PSSA) were characterized by fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The water uptake, ionic conductivity, and methanol permeability of the PFA-g-PSSA membrane were also measured. The cell performances of MEA prepared with the PFA-g-PSSA membranes were evaluated and the cell resistances were measured by an impedance analyzer. The MEA using PFA-g-PSSA membranes showed superior performance for DMFCs in comparison with the commercial Nafion 112 membrane.

DMFC (Direct Methanol Fuel Cell)용의 새로운 고분자 전해질 멤브레인을 개발하기 위하여 스티렌 단량체를 poly(tetrafluoroethylene perfluoropropyl vinyl ether) (PFA) 필름에 그라프트 중합 반응시킨 후에 술폰화 반응을 진행하였다. $\Upsilon$-ray를 이용하여 방사선 그라프트 중합 반응시킨 방사선 그라프트 필름의 술폰화 반응은 chlorosulfonic acid/dichloroethane (5 v/v%) 혼합 용액에서 진행하였다. PFA 그라프트 폴리스티렌 멤브레인 (PFA-g-PSSA)의 화학적, 물리적, 전기화학적 및 형태의 특성은 푸리에 변환 적외선 분광기 (FTIR), 이온전도도 측정기 및 주사전자현미경 (SEM)으로 분석하고 함수율과 메탄올 투과도도 측정하였다. PFA-g-PSSA 멤브레인으로 제작한 MEA의 단위전지 성능을 평가하였고, 전지의 셀 저항은 임피던스 분석 장치를 이용하여 측정하였다. PFA-g-PSSA 멤브레인으로 제조한 MEA는 Nafion 112로 제조한 MEA보다 우수한 DMFC 성능을 나타내었다.

Keywords

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