Analysis of the spatially distributed performance degradation of a polymer electrolyte membrane fuel cell stack
- Analysis of the spatially distributed performance degradation of a polymer electrolyte membrane fuel cell stack
- 조민경; 이대녕; 김이영; 한종희; 김형준; 조은애; 임태훈; 헨켄스마이어디억; 유성종; 성영은; 박세규; 장종현
- Polymer electrolyte membrane fuel
cell (PEMFC); Stack; Degradation; Carbon corrosion; Electrode thinning
- Issue Date
- International journal of hydrogen energy
- VOL 39, NO 29, 16548-16555
- Herein we report the spatially uneven degradation of a polymer electrolyte membrane fuel cell (PEMFC) stack operated under load variation. Fifteen sub-membrane electrode assemblies (sub-MEAs) at various cell positions and various points within each cell were obtained from the original MEAs employed in the fuel cell stack. Polarization curves and the voltammetric charge of these MEAs were measured in order to correlate localized performances with the redistributed electrochemically active surface on Pt using the polarization technique and cyclic voltammetry. Several ex situ characterizations including electron probe microanalysis, environmental scanning electron microscopy, and X-ray diffraction were also performed to find evidence, supporting the inhomogeneous degradation of the fuel cell stack. Possible routes and processes for the non-uniform stack degradation during the PEMFC stack operation will also be discussed.
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