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Degradation Accelerated Stress Test of Electrode and Membrane in PEMFC

PEMFC에서 전극과 전해질 막의 열화 가속 시험

  • 송진훈 (순천대학교 화학공학과) ;
  • 김세훈 (현대자동차 환경기술연구소) ;
  • 안병기 (현대자동차 환경기술연구소) ;
  • 고재준 (현대자동차 환경기술연구소) ;
  • 박권필 (순천대학교 화학공학과)
  • Received : 2012.03.27
  • Accepted : 2012.04.27
  • Published : 2012.10.01

Abstract

Until a recent day, degradation of PEMFC MEA (membrane and electrode assembly) has been studied, separated with membrane degradation and electrode degradation, respectively. But membrane and electrode were degraded coincidentally at real PEMFC operation condition. Therefore in this work, AST (Accelerated Stress Test) of MEA degradation was done at the condition that membrane and electrode were degraded simultaneously. There was interaction between membrane degradation and electrode degradation. Membrane degradation reduced the decrease range of catalyst active area by electrode degradation. Electrode degradation reduces increase range of the hydrogen crossover current and FER (Fluoride Emission Rate) by membrane degradation.

최근까지 대부분의 PEMFC MEA (Membrane and Electrode Assembly) 열화 연구는 전극과 전해질막 각각 분리되어 연구되었다. 그런데 실재 PEMFC 운전조건에서는 전극과 막은 동시에 열화된다. 그래서 본 연구에서는 전극과 막열화가 동시에 일어나는 조건에서 열화 가속시험을 하였다. 실험결과 전극과 막 열화가 서로 상호작용함을 보였다. 막열화는 촉매의 활성면적 감소폭을 줄였고, 전극열화는 막의 수소투과 전류와 불소유출속도(FER) 증가폭을 감소시켰다.

Keywords

Acknowledgement

Supported by : 지식경제부

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