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dc.contributor.authorGerteisen, Dietmar-
dc.contributor.authorHakenjos, Alexander-
dc.contributor.authorSchumacher, Jürgen-
dc.date.accessioned2018-10-10T12:32:13Z-
dc.date.available2018-10-10T12:32:13Z-
dc.date.issued2007-11-08-
dc.identifier.issn0378-7753de_CH
dc.identifier.issn1873-2755de_CH
dc.identifier.urihttps://digitalcollection.zhaw.ch/handle/11475/11605-
dc.description.abstractA one-dimensional model of the PEM fuel cell cathode is developed to analyse AC impedance spectra and polarisation curves. The porous gas diffusion electrode is assumed to consist of a network of dispersed catalyst (Pt/C) forming spherically shaped agglomerated zones that are filled with electrolyte. The coupled differential equation system describes: ternary gas diffusion in the backing (O2, N2, water vapour), Fickian diffusion and Tafel kinetics for the oxygen reduction reaction (ORR) inside the agglomerates, proton migration with ohmic losses and double-layer charging in the electrode. Measurements are made of a temperature-controlled fuel cell with a geometric area of 1.4×1.4 cm^2. Lateral homogeneity is ensured by using a high air stoichiometry of 12. The experimentally observed doubling of the Tafel slope is reproduced by the model due to diffusion limitation inside the agglomerates. The model also predicts the behaviour of measured impedance spectra. Model parameters e.g. Tafel slope, ionic resistance and agglomerate radius are varied. It is found that the density of the active agglomerates changes due to the humidification of the electrode and that the Tafel slope changes according to a change in the ORR mechanism. A sensitivity analysis of the model parameters is conducted.de_CH
dc.language.isoende_CH
dc.publisherElsevierde_CH
dc.relation.ispartofJournal of Power Sourcesde_CH
dc.rightsLicence according to publishing contractde_CH
dc.subjectFuel cellde_CH
dc.subjectAc impedancede_CH
dc.subjectProton exchange membranede_CH
dc.subjectNumerical modelde_CH
dc.subject.ddc621.3: Elektro-, Kommunikations-, Steuerungs- und Regelungstechnikde_CH
dc.titleAC impedance modelling study on porous electrodes of proton exchange membrane fuel cells using an agglomerate modelde_CH
dc.typeBeitrag in wissenschaftlicher Zeitschriftde_CH
dcterms.typeTextde_CH
zhaw.departementSchool of Engineeringde_CH
zhaw.organisationalunitInstitute of Computational Physics (ICP)de_CH
dc.identifier.doi10.1016/j.jpowsour.2007.04.071de_CH
zhaw.funding.euNode_CH
zhaw.issue1de_CH
zhaw.originated.zhawYesde_CH
zhaw.pages.end356de_CH
zhaw.pages.start346de_CH
zhaw.publication.statuspublishedVersionde_CH
zhaw.volume173de_CH
zhaw.publication.reviewPeer review (Publikation)de_CH
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Gerteisen, D., Hakenjos, A., & Schumacher, J. (2007). AC impedance modelling study on porous electrodes of proton exchange membrane fuel cells using an agglomerate model. Journal of Power Sources, 173(1), 346–356. https://doi.org/10.1016/j.jpowsour.2007.04.071
Gerteisen, D., Hakenjos, A. and Schumacher, J. (2007) ‘AC impedance modelling study on porous electrodes of proton exchange membrane fuel cells using an agglomerate model’, Journal of Power Sources, 173(1), pp. 346–356. Available at: https://doi.org/10.1016/j.jpowsour.2007.04.071.
D. Gerteisen, A. Hakenjos, and J. Schumacher, “AC impedance modelling study on porous electrodes of proton exchange membrane fuel cells using an agglomerate model,” Journal of Power Sources, vol. 173, no. 1, pp. 346–356, Nov. 2007, doi: 10.1016/j.jpowsour.2007.04.071.
GERTEISEN, Dietmar, Alexander HAKENJOS und Jürgen SCHUMACHER, 2007. AC impedance modelling study on porous electrodes of proton exchange membrane fuel cells using an agglomerate model. Journal of Power Sources. 8 November 2007. Bd. 173, Nr. 1, S. 346–356. DOI 10.1016/j.jpowsour.2007.04.071
Gerteisen, Dietmar, Alexander Hakenjos, and Jürgen Schumacher. 2007. “AC Impedance Modelling Study on Porous Electrodes of Proton Exchange Membrane Fuel Cells Using an Agglomerate Model.” Journal of Power Sources 173 (1): 346–56. https://doi.org/10.1016/j.jpowsour.2007.04.071.
Gerteisen, Dietmar, et al. “AC Impedance Modelling Study on Porous Electrodes of Proton Exchange Membrane Fuel Cells Using an Agglomerate Model.” Journal of Power Sources, vol. 173, no. 1, Nov. 2007, pp. 346–56, https://doi.org/10.1016/j.jpowsour.2007.04.071.


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