PEMFC performance on reverse voltage by fuel starvation

연료 부족에 의한 고분자전해질형 연료전지의 역전압 성능

  • Lee, Hung-Joo (Department of Chemical Engineering, University of Ulsan) ;
  • Song, Hyun-Do (Department of Chemical Engineering, University of Ulsan) ;
  • Kim, Jun-Bom (Department of Chemical Engineering, University of Ulsan)
  • 이흥주 (울산대학교 화학공학부) ;
  • 송현도 (울산대학교 화학공학부) ;
  • 김준범 (울산대학교 화학공학부)
  • Published : 2006.06.15

Abstract

The performance of proton exchange membrane fuel cell was decreased by reverse voltage using fuel starvation. Performance decrease in local area could be affected by duration and extent of reverse voltage. Hydrogen and air stoichiometic ratio was used to find the experimental condition of abrupt voltage decrease. LabVIEW was used to make control logic of automatic load off system in preset voltage. Reverse voltage experiment was done down to -1.2 V at constant current condition. When fuel cell voltage was reached to preset voltage, electronic load was disconnected to make open circuit voltage for 1 minute. Fuel cell performance was checked every 5 cycle and the degree of performance decrease and/or recovery was estimated. Ohmic resistance and charge transfer resistance were increased and platinum surface area was reduced 41% after reverse voltage experiment.

Keywords

Fuel starvation;Air starvation;Reverse voltage;Proton exchange membrane fuel cell;Stoichiometry

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