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Article: Importance of pressure gradient in solid oxide fuel cell electrodes for modeling study

TitleImportance of pressure gradient in solid oxide fuel cell electrodes for modeling study
Authors
KeywordsElectrochemical model
Mass transfer
Methane steam reforming (MSR)
Porous media
SOFC
Water gas shift (WGS)
Issue Date2008
PublisherElsevier SA. The Journal's web site is located at http://www.elsevier.com/locate/jpowsour
Citation
Journal Of Power Sources, 2008, v. 183 n. 2, p. 668-673 How to Cite?
AbstractThe pressure gradients in the electrodes of a solid oxide fuel cell (SOFC) are frequently neglected without any justification in calculating the concentration overpotentials of the SOFC electrodes in modeling studies. In this short communication, a comparative study has been conducted to study the effect of pressure gradients on mass transfer and the resulting concentration overpotentials of an SOFC running on methane (CR4) fuel. It is found that the pressure gradients in both anode and cathode are significant in the fuel cell electrochemical activities. Neglecting the anode pressure gradient in the calculation can lead to underestimation of the concentration overpotential by about 20% at a typical current density of 5000 A m-2 and at a temperature of 1073 K. The deviation can be even larger at a higher temperature. At the cathode, neglecting the pressure gradient can result in overestimation of the concentration overpotential by about 10% under typical working conditions. © 2008 Elsevier B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/59122
ISSN
2015 Impact Factor: 6.333
2015 SCImago Journal Rankings: 2.008
ISI Accession Number ID
Funding AgencyGrant Number
CRCG of the University of Hong Kong
Funding Information:

The authors would like to thank the financial support from the CRCG of the University of Hong Kong. The authors also would like to thank Professor S.H. Chan (Nanyang Technological University, Singapore), Professor A.K. Demin (institute of High Temperature Electrochemistry, Russia), and Professor G.Y. Meng (University of Science and Technology of China, P.R. China) for their valuable discussions and suggestions in SOFC research.

References

 

DC FieldValueLanguage
dc.contributor.authorNi, Men_HK
dc.contributor.authorLeung, DYCen_HK
dc.contributor.authorLeung, MKHen_HK
dc.date.accessioned2010-05-31T03:43:15Z-
dc.date.available2010-05-31T03:43:15Z-
dc.date.issued2008en_HK
dc.identifier.citationJournal Of Power Sources, 2008, v. 183 n. 2, p. 668-673en_HK
dc.identifier.issn0378-7753en_HK
dc.identifier.urihttp://hdl.handle.net/10722/59122-
dc.description.abstractThe pressure gradients in the electrodes of a solid oxide fuel cell (SOFC) are frequently neglected without any justification in calculating the concentration overpotentials of the SOFC electrodes in modeling studies. In this short communication, a comparative study has been conducted to study the effect of pressure gradients on mass transfer and the resulting concentration overpotentials of an SOFC running on methane (CR4) fuel. It is found that the pressure gradients in both anode and cathode are significant in the fuel cell electrochemical activities. Neglecting the anode pressure gradient in the calculation can lead to underestimation of the concentration overpotential by about 20% at a typical current density of 5000 A m-2 and at a temperature of 1073 K. The deviation can be even larger at a higher temperature. At the cathode, neglecting the pressure gradient can result in overestimation of the concentration overpotential by about 10% under typical working conditions. © 2008 Elsevier B.V. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherElsevier SA. The Journal's web site is located at http://www.elsevier.com/locate/jpowsouren_HK
dc.relation.ispartofJournal of Power Sourcesen_HK
dc.subjectElectrochemical modelen_HK
dc.subjectMass transferen_HK
dc.subjectMethane steam reforming (MSR)en_HK
dc.subjectPorous mediaen_HK
dc.subjectSOFCen_HK
dc.subjectWater gas shift (WGS)en_HK
dc.titleImportance of pressure gradient in solid oxide fuel cell electrodes for modeling studyen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0378-7753&volume=183&spage=668&epage=673&date=2008&atitle=Importance+of+pressure+gradient+in+solid+oxide+fuel+cell+electrodes+for+modeling+studyen_HK
dc.identifier.emailLeung, DYC: ycleung@hku.hken_HK
dc.identifier.emailLeung, MKH:en_HK
dc.identifier.authorityLeung, DYC=rp00149en_HK
dc.identifier.authorityLeung, MKH=rp00148en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.jpowsour.2008.05.013en_HK
dc.identifier.scopuseid_2-s2.0-48249146679en_HK
dc.identifier.hkuros148585en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-48249146679&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume183en_HK
dc.identifier.issue2en_HK
dc.identifier.spage668en_HK
dc.identifier.epage673en_HK
dc.identifier.isiWOS:000259716600033-
dc.publisher.placeSwitzerlanden_HK
dc.identifier.scopusauthoridNi, M=9268339800en_HK
dc.identifier.scopusauthoridLeung, DYC=7203002484en_HK
dc.identifier.scopusauthoridLeung, MKH=8862966600en_HK

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