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Article: Modeling of an air cathode for microfluidic fuel cells: transport and polarization behaviors

TitleModeling of an air cathode for microfluidic fuel cells: transport and polarization behaviors
Authors
KeywordsAir cathode
Catalyst layers
Cathode polarization
Chemical pattern
Electrode polarizations
Issue Date2011
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/ijhydene
Citation
International Journal of Hydrogen Energy, 2011, v. 36 n. 22, p. 14704-14718 How to Cite?
AbstractAir-cathode microfluidic fuel cells are promising micro-scale power sources that unfortunately undergo substantial performance loss at the cathode. This study therefore develops a mathematical model to gain a better understanding of the fundamental processes and polarization characteristics associated with the MFC air cathode operation so as to find strategies to minimize the cathode polarization. The model is solved for the four regions of an MFC cathode compartment (i.e. gas channel, gas diffusion layer, catalyst layer and electrolyte microchannel), and considers microfluidic flow, species transport, charge transport and multi-step oxygen reduction reactions. Relying on the model, transport and chemical patterns inside the MFC cathode compartment are examined. Corresponding electrode polarization behaviors are analyzed over a wide operating potential range including different forms of resistance. Through a series of model-based parametric studies, it is found that the internal transfer resistance slightly decreases with increasing catalyst layer porosity but can be effectively reduced through a proper control of electrolyte hydrodynamic conditions, indicating microfluidic technology is a powerful tool for enhancing electrochemical cells. © 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/157149
ISSN
2015 Impact Factor: 3.205
2015 SCImago Journal Rankings: 1.330
ISI Accession Number ID
Funding AgencyGrant Number
ICEE
CRCG of the University of Hong Kong
Funding Information:

The authors wish to acknowledge the ICEE and CRCG of the University of Hong Kong for supporting this project.

References

 

DC FieldValueLanguage
dc.contributor.authorWang, Hen_US
dc.contributor.authorLeung, DYCen_US
dc.contributor.authorXuan, Jen_US
dc.date.accessioned2012-08-08T08:45:32Z-
dc.date.available2012-08-08T08:45:32Z-
dc.date.issued2011en_US
dc.identifier.citationInternational Journal of Hydrogen Energy, 2011, v. 36 n. 22, p. 14704-14718en_US
dc.identifier.issn0360-3199en_US
dc.identifier.urihttp://hdl.handle.net/10722/157149-
dc.description.abstractAir-cathode microfluidic fuel cells are promising micro-scale power sources that unfortunately undergo substantial performance loss at the cathode. This study therefore develops a mathematical model to gain a better understanding of the fundamental processes and polarization characteristics associated with the MFC air cathode operation so as to find strategies to minimize the cathode polarization. The model is solved for the four regions of an MFC cathode compartment (i.e. gas channel, gas diffusion layer, catalyst layer and electrolyte microchannel), and considers microfluidic flow, species transport, charge transport and multi-step oxygen reduction reactions. Relying on the model, transport and chemical patterns inside the MFC cathode compartment are examined. Corresponding electrode polarization behaviors are analyzed over a wide operating potential range including different forms of resistance. Through a series of model-based parametric studies, it is found that the internal transfer resistance slightly decreases with increasing catalyst layer porosity but can be effectively reduced through a proper control of electrolyte hydrodynamic conditions, indicating microfluidic technology is a powerful tool for enhancing electrochemical cells. © 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.en_US
dc.languageengen_US
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/ijhydeneen_US
dc.relation.ispartofInternational Journal of Hydrogen Energyen_US
dc.subjectAir cathodeen_US
dc.subjectCatalyst layersen_US
dc.subjectCathode polarizationen_US
dc.subjectChemical patternen_US
dc.subjectElectrode polarizationsen_US
dc.titleModeling of an air cathode for microfluidic fuel cells: transport and polarization behaviorsen_US
dc.typeArticleen_US
dc.identifier.emailLeung, DYC: ycleung@hku.hken_US
dc.identifier.authorityLeung, DYC=rp00149en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/j.ijhydene.2011.08.033en_US
dc.identifier.scopuseid_2-s2.0-80054051909en_US
dc.identifier.hkuros205275-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-80054051909&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume36en_US
dc.identifier.issue22en_US
dc.identifier.spage14704en_US
dc.identifier.epage14718en_US
dc.identifier.isiWOS:000297390900040-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridXuan, J=25722402300en_US
dc.identifier.scopusauthoridLeung, DYC=7203002484en_US
dc.identifier.scopusauthoridWang, H=36844957100en_US
dc.identifier.citeulike9768036-

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