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Electrode Reoxidation in Solid-Oxide Cells: Detailed Modeling of Nickel Oxide Film Growth

Neidhardt, Jonathan and Kee, Robert J. and Bessler, Wolfgang G. (2013) Electrode Reoxidation in Solid-Oxide Cells: Detailed Modeling of Nickel Oxide Film Growth. In: Proceedings of the 13th international symposium on solid oxide fuel cells (SOFC-XIII), 57 (1), pp. 2573-2582. The Electrochemical Society. SOFC-XIII, 6.-11. Okt. 2013, Okinawa, Japan. ISBN 978-1-60768-459-6 ISSN 1938-6737

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Abstract

The lifetime and performance of solid-oxide fuel cells (SOFC) and electrolyzer cells (SOEC) can be significantly degraded by oxidation of nickel within the electrode and support structures. This paper documents a detailed computational model describing nickel oxide (NiO) formation as a growing film layer on top of the nickel phase in Ni/YSZ composite electrodes. The model assumes that the oxidation rate is controlled by transport of ions across the film (Wagner’s theory). The computational model, which is implemented in a two-dimensional continuum framework, facilitates the investigation of alternative chemical reaction and transport mechanisms. Model predictions agree well with a literature experimental measurement of oxidation-layer growth. In addition to providing insight in interpreting experimental observations, the model provides a quantitative predictive capability for improving electrode design and controlling operating conditions.

Item URL in elib:https://elib.dlr.de/84934/
Document Type:Conference or Workshop Item (Speech)
Title:Electrode Reoxidation in Solid-Oxide Cells: Detailed Modeling of Nickel Oxide Film Growth
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Neidhardt, JonathanJonathan.Neidhardt (at) dlr.deUNSPECIFIED
Kee, Robert J.rjkee (at) mines.eduUNSPECIFIED
Bessler, Wolfgang G.wolfgang.bessler (at) hs-offenburg.deUNSPECIFIED
Date:2013
Journal or Publication Title:Proceedings of the 13th international symposium on solid oxide fuel cells (SOFC-XIII)
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:57
Page Range:pp. 2573-2582
Editors:
EditorsEmail
UNSPECIFIEDThe Electrochemical Society
Publisher:The Electrochemical Society
Series Name:ecsTransactions
ISSN:1938-6737
ISBN:978-1-60768-459-6
Status:Published
Keywords:SOFC, model, nickel oxide
Event Title:SOFC-XIII
Event Location:Okinawa, Japan
Event Type:international Conference
Event Dates:6.-11. Okt. 2013
HGF - Research field:Energy
HGF - Program:Efficient Energy Conversion and Use (old)
HGF - Program Themes:Fuel Cells (old)
DLR - Research area:Energy
DLR - Program:E EV - Energy process technology
DLR - Research theme (Project):E - Elektrochemische Prozesse (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Computational Electrochemistry
Deposited By: Neidhardt, Jonathan
Deposited On:05 Nov 2013 15:12
Last Modified:31 Jul 2019 19:42

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