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Spatiotemporal simulation of nickel oxide and carbon phases formation in solid oxide fuel cells (SOFC)

  • The formation of secondary phases in the porous electrodes is a severe mechanism affecting the lifetime of solid oxide fuel cells (SOFC). It can occur via various chemical mechanisms and it has a significant influence on cell performance due to pore clogging and deactivation of active surfaces and triple-phase boundary (TPB). We present a modeling and simulation study of nickel oxide formationThe formation of secondary phases in the porous electrodes is a severe mechanism affecting the lifetime of solid oxide fuel cells (SOFC). It can occur via various chemical mechanisms and it has a significant influence on cell performance due to pore clogging and deactivation of active surfaces and triple-phase boundary (TPB). We present a modeling and simulation study of nickel oxide formation (reoxidation) and carbon formation (coking) within the SOFC anode. We use a 2D continuum model based on a multi-phase framework [Neidhardt et al., J. Electrochem. Soc., 159, 9 (2012)] that allows the introduction of arbitrary solid phases (here: Ni, YSZ, NiO, Carbon) plus gas phase. Reactions between the bulk phases are modeled via interface-adsorbed species and are described by an elementary kinetic approach. Published experimental data are used for parameterization and validation. Simulations allow the prediction of cell performance under critical operation conditions, like (i) a non-fuel operation test, where NiO formation is taking place (Figure 1a), or (ii) an open circuit voltage (OCV) stability test under hydrocarbon atmosphere, where solid carbon is formed (Figure 1b). Results are applied for enhanced interpretation of experimental data and for prediction of safe operation conditions.show moreshow less

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Metadaten
Document Type:Conference Proceeding
Conference Type:Konferenzartikel
Zitierlink: https://opus.hs-offenburg.de/1532
Bibliografische Angaben
Title (English):Spatiotemporal simulation of nickel oxide and carbon phases formation in solid oxide fuel cells (SOFC)
Conference:International Conference Fundamentals and Development of Fuel Cells (5. : 16 to 18 April 2013 : Karlsruhe, Germany)
Author:Jonathan Philipp Neidhardt, Vitaliy Yurkiv, Wolfgang G. BesslerStaff MemberORCiDGND
Year of Publication:2013
Creating Corporation:FDFC
First Page:1
Last Page:13
Parent Title (English):FDFC 2013
URL:https://elib.dlr.de/84933/
Language:English
Inhaltliche Informationen
Institutes:Forschung / INES - Institut für nachhaltige Energiesysteme (bis 18.11.2021: Institut für Energiesystemtechnik)
Fakultät Elektrotechnik und Informationstechnik (E+I) (bis 03/2019)
Institutes:Bibliografie
GND Keyword:Brennstoffzelle; Karbon; Nickel; Oxidation
Formale Angaben
Open Access: Open Access 
Licence (German):License LogoUrheberrechtlich geschützt