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Article: Chaotic flow-based fuel cell built on counter-flow microfluidic network: Predicting the over-limiting current behavior

TitleChaotic flow-based fuel cell built on counter-flow microfluidic network: Predicting the over-limiting current behavior
Authors
KeywordsCell architectures
Chaotic flows
Current behaviors
Electricity output
Flow channels
Issue Date2011
PublisherElsevier SA. The Journal's web site is located at http://www.elsevier.com/locate/jpowsour
Citation
Journal Of Power Sources, 2011, v. 196 n. 22, p. 9391-9397 How to Cite?
AbstractThe membraneless microfluidic fuel cell (MFC) is a promising micro-scale power source with potentially wide applications. MFC commonly relies on the co-laminar microfluidic platform in which redox streams flow in parallel in a microchannel. The nature of this cell architecture limits the mass transport inside the cell, often resulting in low power density. To overcome the issues, we propose an innovative concept of chaotic flow-based fuel cell (CFFC), which is built on a counter-flow microfluidic platform with the flow channel patterned with micro-ridges. A CFD/electrochemical model is used to predict the performance and investigate the underlay mechanism of the CFFC. Two theoretical upper bounds, i.e., the limiting current and limiting fuel conversion for conventional MFC, are derived. Through the results, it is found that the generation of chaotic flow inside the patterned activation zone enables the CFFC to exceed the theoretical limitations and work with over-limiting current for high-power output. Meanwhile, the interfacial mixing and crossover is minimized by the counter-flow microfluidics, allowing for over-limiting fuel conversion to useful electricity output. The achievement of unprecedented operating regime demonstrated in this study open up a new direction towards optimization, operating and design of the MFC. © 2011 Elsevier B.V.
Persistent Identifierhttp://hdl.handle.net/10722/157138
ISSN
2015 Impact Factor: 6.333
2015 SCImago Journal Rankings: 2.008
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorXuan, Jen_HK
dc.contributor.authorLeung, DYCen_HK
dc.contributor.authorLeung, MKHen_HK
dc.contributor.authorWang, Hen_HK
dc.contributor.authorNi, Men_HK
dc.date.accessioned2012-08-08T08:45:29Z-
dc.date.available2012-08-08T08:45:29Z-
dc.date.issued2011en_HK
dc.identifier.citationJournal Of Power Sources, 2011, v. 196 n. 22, p. 9391-9397en_HK
dc.identifier.issn0378-7753en_HK
dc.identifier.urihttp://hdl.handle.net/10722/157138-
dc.description.abstractThe membraneless microfluidic fuel cell (MFC) is a promising micro-scale power source with potentially wide applications. MFC commonly relies on the co-laminar microfluidic platform in which redox streams flow in parallel in a microchannel. The nature of this cell architecture limits the mass transport inside the cell, often resulting in low power density. To overcome the issues, we propose an innovative concept of chaotic flow-based fuel cell (CFFC), which is built on a counter-flow microfluidic platform with the flow channel patterned with micro-ridges. A CFD/electrochemical model is used to predict the performance and investigate the underlay mechanism of the CFFC. Two theoretical upper bounds, i.e., the limiting current and limiting fuel conversion for conventional MFC, are derived. Through the results, it is found that the generation of chaotic flow inside the patterned activation zone enables the CFFC to exceed the theoretical limitations and work with over-limiting current for high-power output. Meanwhile, the interfacial mixing and crossover is minimized by the counter-flow microfluidics, allowing for over-limiting fuel conversion to useful electricity output. The achievement of unprecedented operating regime demonstrated in this study open up a new direction towards optimization, operating and design of the MFC. © 2011 Elsevier B.V.en_HK
dc.languageengen_US
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.subjectCell architecturesen_HK
dc.subjectChaotic flowsen_HK
dc.subjectCurrent behaviorsen_HK
dc.subjectElectricity outputen_HK
dc.subjectFlow channels-
dc.titleChaotic flow-based fuel cell built on counter-flow microfluidic network: Predicting the over-limiting current behavioren_HK
dc.typeArticleen_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_fulltexten_US
dc.identifier.doi10.1016/j.jpowsour.2011.06.065en_HK
dc.identifier.scopuseid_2-s2.0-80052467476en_HK
dc.identifier.hkuros200087-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-80052467476&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume196en_HK
dc.identifier.issue22en_HK
dc.identifier.spage9391en_HK
dc.identifier.epage9397en_HK
dc.identifier.isiWOS:000295602400040-
dc.publisher.placeSwitzerlanden_HK
dc.identifier.scopusauthoridXuan, J=25722402300en_HK
dc.identifier.scopusauthoridLeung, DYC=7203002484en_HK
dc.identifier.scopusauthoridLeung, MKH=8862966600en_HK
dc.identifier.scopusauthoridWang, H=36844957100en_HK
dc.identifier.scopusauthoridNi, M=9268339800en_HK
dc.identifier.citeulike9495292-

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