Stack-Level Modeling of Degradation in Solid Oxide Fuel Cells - Part I : Contact Degradation

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DOIResolve DOI: http://doi.org/10.1016/j.jpowsour.2007.10.047
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TypeArticle
Journal titleJournal of Power Sources
Volume176
Issue1
Pages138154; # of pages: 17
SubjectSOFC; Degradation; Diagnosis; Model; Impedance spectroscopy
AbstractAs the first part of a two paper series, we present a two-dimensional impedance model of a working solid oxide fuel cell (SOFC) to study the effect of contact degradation on the impedance spectrum for the purpose of non-invasive diagnosis. The two dimensional modeled geometry includes the ribbed interconnect, and is adequate to represent co- and counter-flow configurations. Simulated degradation modes include: cathode delamination, interconnect oxidation, and interconnect-cathode detachment. The simulations show differences in the way each degradation mode impacts the impedance spectrum shape, suggesting that identification is possible. In Part II, we present a sensitivity analysis of the results to input parameter variability that reveals strengths and limitations of the method, as well as describing possible interactions between input parameters and concurrent degradation modes.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada
Peer reviewedNo
NPARC number8901143
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Record identifier6a8c0416-7a92-4062-9865-ab675079f643
Record created2009-04-22
Record modified2016-05-09
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