Determination of DMFC deterioration during long-term operation

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A new method to analyze deteriorated direct methanol fuel cells (DMFCs) by combining electrochemical impedance analysis and physicochemical investigations is proposed. To make a comparison, one pristine membrane electrode assembly (MEA) and one deteriorated MEA, following 1000 h of continuous operation, were prepared. A unique impedance analysis enabled the separation of the impedance values for the cathode and the anode, and it was possible to determine that the deterioration of the MEA mainly came from the deterioration of the cathode. Several physicochemical investigations were made to show the relationship between the electrochemical properties and the deterioration of the MEA. (c) 2006 Elsevier B.V. All rights reserved.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2006-09
Language
English
Article Type
Article
Keywords

MEMBRANE-ELECTRODE ASSEMBLIES; FUEL-CELL; IMPEDANCE SPECTROSCOPY; XPS ANALYSIS; PERFORMANCE; PEFC; DEGRADATION; CATALYST; LAYER; XRD

Citation

JOURNAL OF POWER SOURCES, v.160, no.1, pp.440 - 445

ISSN
0378-7753
DOI
10.1016/j.jpowsour.2005.12.057
URI
http://hdl.handle.net/10203/175125
Appears in Collection
CBE-Journal Papers(저널논문)
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