한국수소및신에너지학회논문집 (Transactions of the Korean hydrogen and new energy society)

  • 제20권4호
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  • Pages.317-322
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  • 2009
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  • 1738-7264(pISSN)
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  • 2288-7407(eISSN)
한국수소및신에너지학회 (The Korean Hydrogen and New Energy Society)
권호 표지

시동/정지 반복에 따른 고분자전해질 연료전지의 성능 저하에 관한 연구

A Study on Performance Degradation of PEMFC by Repetitive Startup/Shutdown Cycling

  • 조유연 (서울시립대학교, 화학공학과) ;
  • 조은애 (한국과학기술연구원 연료전지연구단) ;
  • 김정현 (서울시립대학교, 화학공학과)
  • 발행 : 2009.08.30
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초록

To investigate degradation mechanism of PEMFC operated with repetitive startup/shutdown cycling, i-V characteristics, impedance, cyclic voltamograms were measured. OCV decreased from 0.967 to 0.951 V while the cell voltage at 800mA/$cm^2$ from 0.657 to 0.563V, implying that the electrodes rather than membrane electrolyte was damaged during the cycling operation. Electrochemical analyses supported that the performance degradation could be mainly attributed to degradation of the electrodes such as a decrease in electrochemical active surface area rather than degradation of membrane.

키워드

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