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Experiments and Modeling of Electrochemical Impedance Spectroscopy on Pressurized SOFC

Willich, Caroline and Henke, Moritz and Westner, Christina and Leucht, Florian and Bessler, Wolfgang G. and Kallo, Josef and Friedrich, K. Andreas (2012) Experiments and Modeling of Electrochemical Impedance Spectroscopy on Pressurized SOFC. ECS 222, 7.-12. Okt. 2012, Honululu, Hawaii, USA.

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Abstract

For this contribution a combined experimental and modeling approach was used. Impedance measurements were performed on a five-cell anode-supported SOFC short stack at pressures between 1 and 8 bar. Each cell has an active area of 84 cm². Impedance spectra were taken at OCV and increasing current densities up to 25 A. The multi-scale model used for the simulations is based on an in-house software [4] and is representing the system including the electrochemical reactions on the surface of the electrodes, gas transport within the porous electrodes and in the gas channels on cell level and the thermal coupling of five cells to include temperature-related effects on stack level. The model was validated with current/voltage characteristics and impedance measurements in a wide range of operating conditions

Item URL in elib:https://elib.dlr.de/78329/
Document Type:Conference or Workshop Item (Speech)
Title:Experiments and Modeling of Electrochemical Impedance Spectroscopy on Pressurized SOFC
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Willich, Carolinecaroline.willich (at) dlr.deUNSPECIFIED
Henke, MoritzUNSPECIFIEDUNSPECIFIED
Westner, ChristinaChristina.Westner (at) dlr.deUNSPECIFIED
Leucht, FlorianUNSPECIFIEDUNSPECIFIED
Bessler, Wolfgang G.wolfgang.bessler (at) dlr.deUNSPECIFIED
Kallo, Josefjosef.kallo (at) dlr.deUNSPECIFIED
Friedrich, K. Andreasandreas.friedrich (at) dlr.deUNSPECIFIED
Date:2012
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:PSOFC, Impedance,
Event Title:ECS 222
Event Location:Honululu, Hawaii, USA
Event Type:international Conference
Event Dates:7.-12. Okt. 2012
Organizer:Electrochemical Society
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 > Electrochemical Energy Technology
Deposited By: Willich, Caroline
Deposited On:19 Nov 2012 12:47
Last Modified:19 Nov 2012 12:49

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