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Kinetic Modeling of Nickel Oxidation in SOFC Anodes

Neidhardt, Jonathan and Henke, Moritz and Bessler, W.G. (2011) Kinetic Modeling of Nickel Oxidation in SOFC Anodes. In: ECS Transactions, 35 (1), pp. 1621-1629. 219th ECS Meeting & SOFC-XII, 1.-6. Mai 2011, Montreal, QC, Canada.

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Abstract

Understanding the mechanisms of performance degradation is of key importance for increasing the lifetime of solid oxide fuel cells (SOFC). The aim of this work is to achieve a deeper understanding of the processes leading to nickel oxidation at Ni/YSZ composite anodes. We present a kinetic model of chemical nickel oxidation which was integrated into a two-dimensional model of an anode-supported single cell. The feedback between nickel oxidation and cell performance was modeled by taking into account both, a loss in kinetic performance (via reducing three-phase boundary length) and a reduction in gas-phase diffusivity (via porosity decrease upon solid volume expansion). The simulations allow the quantification of nickel oxide formation over time and its influence on the cell performance.

Item URL in elib:https://elib.dlr.de/70502/
Document Type:Conference or Workshop Item (Paper, Poster)
Title:Kinetic Modeling of Nickel Oxidation in SOFC Anodes
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Neidhardt, Jonathanjonathan.neidhardt (at) dlr.deUNSPECIFIED
Henke, Moritzmoritz.henke (at) dlr.deUNSPECIFIED
Bessler, W.G.wolfgang.bessler (at) dlr.deUNSPECIFIED
Date:2011
Journal or Publication Title:ECS Transactions
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:35
Page Range:pp. 1621-1629
Editors:
EditorsEmail
The Electrochemical Society, ECS
Series Name:ECS Transactions
Status:Published
Keywords:nickel oxide, model, solid oxide fuel cell, thermochemical, electrochemical
Event Title:219th ECS Meeting & SOFC-XII
Event Location:Montreal, QC, Canada
Event Type:international Conference
Event Dates:1.-6. Mai 2011
Organizer:The Electrochemical Society
HGF - Research field:Energy
HGF - Program:Efficient Energy Conversion (old)
HGF - Program Themes:E EV - Energy process technology (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 > Electrochemical Energy Technology
Deposited By: Neidhardt, Jonathan
Deposited On:26 Jul 2011 09:55
Last Modified:26 Jul 2011 09:55

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