Journal of the Korean Electrochemical Society (전기화학회지)

The Korean Electrochemical Society (한국전기화학회)
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A Study on Sulfonated Fluorenyl Poly(ether sulfone)s as Catalyst Binders for Polymer Electrolyte Fuel Cells

고분자 전해질 연료전지 촉매층 바인더를 위한 Sulfonated Fluorenyl Poly(ether sulfone)에 관한 연구

  • Cho, Won Jae (Department of Energy Storage and Conversion Engineering, Chonbuk National University) ;
  • Lee, Mi Soon (Department of Energy Storage and Conversion Engineering, Chonbuk National University) ;
  • Lee, Youn Sik (Division of Chemical Engineering, Chonbuk National University) ;
  • Yoon, Young Gi (Hydrogen and Fuel Cell Center for Industry, Academy, and Laboratories, Korea Institute of Energy Research(KIER)) ;
  • Choi, Young Woo (Hydrogen and Fuel Cell Center for Industry, Academy, and Laboratories, Korea Institute of Energy Research(KIER))
  • 조원재 (전북대학교 에너지저장변환공학과) ;
  • 이미순 (전북대학교 에너지저장변환공학과) ;
  • 이연식 (전북대학교 화학공학부) ;
  • 윤영기 (한국에너지기술연구원 수소연료전지산학연협력센터) ;
  • 최영우 (한국에너지기술연구원 수소연료전지산학연협력센터)
  • Received : 2016.04.25
  • Accepted : 2016.05.03
  • Published : 2016.05.31
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Abstract

Oxygen reduction reaction in the fuel cell (ORR) plays a dominant role in the overall reaction. In addition, the low compatibility between the membrane and the binder consisted of different materials, greatly reduces the efficiency of the fuel cell performance. In view of these two problems, geometrically modified copolymers with 9.9_Bis (4-hydroxyphenyl) were synthesized via condensation reaction instead of conventional biphenol and were adopted as hydrocarbon ionomer binders. By utilizing these binders, two kinds of MEAs using fluorinated Nafion membrane and hydrocarbon based membrane were manufactured in order to electrochemical performance evaluation. With current-voltage curves, there was no significant difference in the 0.6 V when two types of membrane were applied. Also, tafel slope became considerably lower as compared to the Nafion membrane. Thus, it is determined that the new hydrocarbon binder is expected to contribute the improvement in performance of fuel cells.

연료전지에서 산소 환원 반응 (ORR)은 전체 반응에서 지배적인 역할을 한다. 또한 서로 다른 물질로 이루어진 막과 바인더 간의 낮은 호환성은 연료전지 효율을 크게 감소시킨다. 이러한 두 가지 문제점을 고려하여, 본 연구에서는 기존의 일반적인 Biphenol 대신 입체적 구조를 갖는 9,9_Bis(4-hydroxyphenyl) fluorine를 이용한 고분자를 합성하여 각각의 전극 바인더를 제조하였고, 이를 이용하여 각각의 나피온 막과 탄화수소 막 위에 스프레이 기법으로 MEA를 제조하여 전기화학적 성능 평가를 진행하였다. 그 결과 전류-전압 곡선에서의 0.6 V의 성능이 두 종류의 다른 막을 적용 했을 때 큰 차이를 보이지 않았으며, 탄화 수소 막의 타펠 기울기의 정도가 나피온 막에 비해 현저히 낮았다. 이를 통해 본 연구에서 적용된 아이오노머 바인더가 연료 전지성능 향상에 더 기여할 수 있을 것으로 판단 된다.

Keywords

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