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Imaging concentration fields in microfluidic fuel cells as a mass transfer characterization platform

hal.structure.identifierInstitut de Mécanique et d'Ingénierie [I2M]
dc.contributor.authorGARCIA, Marine
hal.structure.identifierInstitut de Mécanique et d'Ingénierie [I2M]
dc.contributor.authorSOMMIER, Alain
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorMICHAU, Dominique
hal.structure.identifierLaboratoire du Futur [LOF]
dc.contributor.authorCLISSON, Gérald
hal.structure.identifierInstitut de Mécanique et d'Ingénierie [I2M]
dc.contributor.authorBATSALE, Jean-Christophe
hal.structure.identifierInstitut de Mécanique et d'Ingénierie [I2M]
dc.contributor.authorCHEVALIER, Stéphane
dc.date.issued2023
dc.identifier.issn0013-4686
dc.description.abstractEnMicrofluidic fuel cells (MFCs) are microfluidic electrochemical conversion devices that are used to power electrical equipment. Their performance relies on improving reactant mass transfer at the electrode interface. In this work, a MFC is developed to implement a novel imaging technique that allows the measurement of reactant concentration fields, featuring formic acid as the fuel and potassium permanganate as the oxidant. The concentration fields were imaged based on transmitted visible spectroscopy, which links the light intensity passing through the MFC to its local reactant concentration. An analytical model was developed to estimate the mass diffusivity and kinetic reaction rate coefficient. For the first time, mass transport and transfer coefficient were simultaneously measured during operation. These parameters estimated using the proposed technique can be implemented in a numerical model to predict the MFC performance and concentration distribution. This work paves the way towards advanced imaging tools for operando mass transfer characterizations in microfluidics and Tafel kinetic characterization in many electrochemical devices.
dc.description.sponsorshipIMagerie Multiphysique des Piles A Combustible microfluidiques - ANR-20-CE05-0018
dc.language.isoen
dc.publisherElsevier
dc.subject.enFuel cells
dc.subject.enImaging
dc.subject.enSpectroscopy
dc.subject.enMass transfer
dc.subject.enMicrofluidic
dc.subject.enConcentration fields
dc.title.enImaging concentration fields in microfluidic fuel cells as a mass transfer characterization platform
dc.typeArticle de revue
dc.identifier.doi10.1016/j.electacta.2023.142489
dc.subject.halChimie/Matériaux
bordeaux.journalElectrochimica Acta
bordeaux.page142489 (8 p.)
bordeaux.volume460
bordeaux.peerReviewedoui
hal.identifierhal-04105959
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-04105959v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Electrochimica%20Acta&rft.date=2023&rft.volume=460&rft.spage=142489%20(8%20p.)&rft.epage=142489%20(8%20p.)&rft.eissn=0013-4686&rft.issn=0013-4686&rft.au=GARCIA,%20Marine&SOMMIER,%20Alain&MICHAU,%20Dominique&CLISSON,%20G%C3%A9rald&BATSALE,%20Jean-Christophe&rft.genre=article


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