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Effect of Electrode Degradation on the Membrane Degradation in PEMFC

PEMFC에서 전극 열화가 전해질 막 열화에 미치는 영향

  • Song, Jinhoon (Department of Chemical Engineering, Sunchon National University) ;
  • Kim, Saehoon (HMC Eco Technology Research Institute) ;
  • Ahn, Byungki (HMC Eco Technology Research Institute) ;
  • Ko, Jaijoon (HMC Eco Technology Research Institute) ;
  • Park, Kwonpil (Department of Chemical Engineering, Sunchon National University)
  • 송진훈 (순천대학교 화학공학과) ;
  • 김세훈 (현대자동차 환경기술연구소) ;
  • 안병기 (현대자동차 환경기술연구소) ;
  • 고재준 (현대자동차 환경기술연구소) ;
  • 박권필 (순천대학교 화학공학과)
  • Received : 2012.09.22
  • Accepted : 2012.10.16
  • Published : 2013.02.01

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. During simultaneous degradation, there was interaction between membrane degradation and electrode degradation. The effect of electrode degradation on membrane degradation was studied in this work. We compared membrane degradation after electrode degradation and membrane degradation without electrode degradation. I-V performance, hydrogen crossover current, fluoride emission rate (FER), impedance and TEM were measured after and before degradation of MEA. Electrode degradation reduced active area of Pt catalyst, and then radical/$H_2O_2$ evolution rate decreased on Pt. Decrease of radical/$H_2O_2$ reduced the velocity of membrane degradation.

Acknowledgement

Supported by : 지식경제부

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