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dc.contributor.authorGerteisen, Dietmar-
dc.contributor.authorHakenjos, Alexander-
dc.contributor.authorSchumacher, Jürgen-
dc.date.accessioned2018-10-15T10:30:16Z-
dc.date.available2018-10-15T10:30:16Z-
dc.date.issued2003-
dc.identifier.isbn3-905592-13-4de_CH
dc.identifier.urihttps://digitalcollection.zhaw.ch/handle/11475/11810-
dc.description.abstractThis paper presents the characterisation of the cathode electrode of proton exchange membrane (PEM) fuel cells by means of AC impedance spectroscopy. Measured steady-state voltammograms and impedance spectra are compared to simulation results obtained with two different models for the cathode electrode. A test fuel cell with an active area of 1.4x1.4 cm^2 and meander-shaped flow-fields is used for the measurements. The cell temperature can be controlled. Measured steadystate voltammograms in the region of low overpotential show a change in the Tafel slope. The radius of the measured AC impedance arc decreases with increasing overvoltage, shows a minimum value and subsequently grows again as the overpotential increases. This is interpreted as mass transport limitation of oxygen. Two mathematical models for the simulation of AC impedance spectra and polarisation curves are investigated. The multi-step model is based on two electrochemical steps for the oxygen reduction reaction (ORR) mechanism. A second model accounts for oxygen transport limitation in spherical agglomerates. It is assumed that in the catalyst layer the dispersed catalyst (Pt/C) forms agglomerated zones filled with the electrolyte. The measured polarisation curves can be fitted both by the multi-step model and the agglomerate model. The quantitative impedance values are reproduced by the multi-step model. However, it does not reproduce the oxygen transport limitation which is observed experimentally. This feature of the impedance spectra is captured by the agglomerate model.de_CH
dc.language.isoende_CH
dc.publisherEuropean Fuel Cell Forumde_CH
dc.rightsLicence according to publishing contractde_CH
dc.subjectPefcde_CH
dc.subjectFuel cellsde_CH
dc.subjectAc impedance spectroscopyde_CH
dc.subject.ddc621.3: Elektro-, Kommunikations-, Steuerungs- und Regelungstechnikde_CH
dc.titleInvestigation of the cathode active layer of PEM fuel cells using AC impedance spectroscopyde_CH
dc.typeKonferenz: Paperde_CH
dcterms.typeTextde_CH
zhaw.departementSchool of Engineeringde_CH
zhaw.organisationalunitInstitute of Computational Physics (ICP)de_CH
zhaw.conference.details2nd European Polymer Eletrolyte Fuel Cell (PEFC) Forum, Lucerne, 30 June - 4 July 2003de_CH
zhaw.funding.euNode_CH
zhaw.originated.zhawNode_CH
zhaw.pages.end282de_CH
zhaw.pages.start271de_CH
zhaw.publication.statuspublishedVersionde_CH
zhaw.volume1de_CH
zhaw.publication.reviewEditorial reviewde_CH
zhaw.title.proceedings2nd European PEFC Forum 2003. Proceedings. Vol.1 : 30 June - 4 July 2003, Lucerne, Switzerlandde_CH
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Gerteisen, D., Hakenjos, A., & Schumacher, J. (2003). Investigation of the cathode active layer of PEM fuel cells using AC impedance spectroscopy [Conference paper]. 2nd European PEFC Forum 2003. Proceedings. Vol.1 : 30 June - 4 July 2003, Lucerne, Switzerland, 1, 271–282.
Gerteisen, D., Hakenjos, A. and Schumacher, J. (2003) ‘Investigation of the cathode active layer of PEM fuel cells using AC impedance spectroscopy’, in 2nd European PEFC Forum 2003. Proceedings. Vol.1 : 30 June - 4 July 2003, Lucerne, Switzerland. European Fuel Cell Forum, pp. 271–282.
D. Gerteisen, A. Hakenjos, and J. Schumacher, “Investigation of the cathode active layer of PEM fuel cells using AC impedance spectroscopy,” in 2nd European PEFC Forum 2003. Proceedings. Vol.1 : 30 June - 4 July 2003, Lucerne, Switzerland, 2003, vol. 1, pp. 271–282.
GERTEISEN, Dietmar, Alexander HAKENJOS und Jürgen SCHUMACHER, 2003. Investigation of the cathode active layer of PEM fuel cells using AC impedance spectroscopy. In: 2nd European PEFC Forum 2003. Proceedings. Vol.1 : 30 June - 4 July 2003, Lucerne, Switzerland. Conference paper. European Fuel Cell Forum. 2003. S. 271–282. ISBN 3-905592-13-4
Gerteisen, Dietmar, Alexander Hakenjos, and Jürgen Schumacher. 2003. “Investigation of the Cathode Active Layer of PEM Fuel Cells Using AC Impedance Spectroscopy.” Conference paper. In 2nd European PEFC Forum 2003. Proceedings. Vol.1 : 30 June - 4 July 2003, Lucerne, Switzerland, 1:271–82. European Fuel Cell Forum.
Gerteisen, Dietmar, et al. “Investigation of the Cathode Active Layer of PEM Fuel Cells Using AC Impedance Spectroscopy.” 2nd European PEFC Forum 2003. Proceedings. Vol.1 : 30 June - 4 July 2003, Lucerne, Switzerland, vol. 1, European Fuel Cell Forum, 2003, pp. 271–82.


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