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Modification of Nafion Membranes with Polyaniline to Reduce Methanol Permeability

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Modification of Nafion Membranes with Polyaniline to Reduce Methanol Permeability

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dc.contributor.author Gonzalez-Ausejo, J. es_ES
dc.contributor.author Cabedo Mas, Luis es_ES
dc.contributor.author Gámez-Pérez, J. es_ES
dc.contributor.author Mollá Romano, Sergio es_ES
dc.contributor.author Giménez Torres, Enrique es_ES
dc.contributor.author Compañ Moreno, Vicente es_ES
dc.date.accessioned 2016-06-21T14:38:50Z
dc.date.available 2016-06-21T14:38:50Z
dc.date.issued 2015
dc.identifier.issn 0013-4651
dc.identifier.uri http://hdl.handle.net/10251/66255
dc.description.abstract The modification of Nafion membranes with polyaniline (PAni) has been studied as an alternative for reducing methanol crossover in direct methanol fuel cells (DMFC). The modification has been performed by directly polymerizing the PAni following two different routes: immersion (Naf-S-Y, where S mean surface and Y the number of hours exposition) and crossover (Naf-C-Y, where C means crossover). The former consist of exposing the membranes to a reactive solution containing the aniline, oxidant and catalyst; while in the latter the aniline and a solution with the oxidant and the catalyst are in different chambers separated by the membrane, thus forcing them to react inside it. The effect of the modification mechanism and the reaction times has been studied. The resulting membranes were extensively characterized by means of Fourier Transform Infrared (FTIR), ionic exchange capacity (IEC), water uptake (WU), methanol permeability and single direct methanol fuel cell performance. Chemical characterization revealed that the oxidation state of the polyaniline was in all cases emeraldine and the amount of PAni for an equivalent exposure time was bigger for the crossover route. The crossover route has proven to be more effective in decreasing the apparent methanol permeability of Nafion modified membranes up to 48% for the crossover sample with higher modification time when the polymerization is due inside the membrane such is the case of the composite Naf-C-Y membranes. The Direct Methanol Fuel Cells performances of membrane-electrode assemblies prepared with pristine Nafion and Nafion-PAni membranes were tested at 40, 60 and 80 degrees C under 2 M methanol concentration. The results are compared with those found for Nafion pristine membranes which power densities were 90, 65, 60 and 50 mW/cm(2) at 80 degrees C for Nafion, Naf-S-1, Naf-S-5 and Naf-C-2, membranes respectively. es_ES
dc.description.sponsorship This research is in the frame of Support Program for Research and Development of the Polytechnic University of Valencia and the Ministry of Science and Innovation for funding provided through the projects: SP-ENE-20120718 and 24761, respectively. en_EN
dc.language Inglés es_ES
dc.publisher Electrochemical Society es_ES
dc.relation Support Program for Research and Development of the Polytechnic University of Valencia SP-ENE-20120718 es_ES
dc.relation Ministry of Science and Innovation 24761 es_ES
dc.relation.ispartof Journal of The Electrochemical Society es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject THERMAL-STABILITY es_ES
dc.subject NAFION/POLYANILINE COMPOSITE MEMBRANES es_ES
dc.subject FUEL-CELL PERFORMANCE es_ES
dc.subject TRANSPORT-PROPERTIES es_ES
dc.subject PEMFC es_ES
dc.subject DMFC es_ES
dc.subject CONDUCTIVITY es_ES
dc.subject MORPHOLOGY es_ES
dc.subject.classification MAQUINAS Y MOTORES TERMICOS es_ES
dc.subject.classification FISICA APLICADA es_ES
dc.subject.classification CIENCIA DE LOS MATERIALES E INGENIERIA METALURGICA es_ES
dc.title Modification of Nafion Membranes with Polyaniline to Reduce Methanol Permeability es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1149/2.0521514jes
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Termodinámica Aplicada - Departament de Termodinàmica Aplicada es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Ingeniería Mecánica y de Materiales - Departament d'Enginyeria Mecànica i de Materials es_ES
dc.description.bibliographicCitation Gonzalez-Ausejo, J.; Cabedo Mas, L.; Gámez-Pérez, J.; Mollá Romano, S.; Giménez Torres, E.; Compañ Moreno, V. (2015). Modification of Nafion Membranes with Polyaniline to Reduce Methanol Permeability. Journal of The Electrochemical Society. 162(14):E325-E333. doi:10.1149/2.0521514jes es_ES
dc.description.accrualMethod Senia es_ES
dc.relation.publisherversion http://dx.doi.org/10.1149/2.0521514jes es_ES
dc.description.upvformatpinicio E325 es_ES
dc.description.upvformatpfin E333 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 162 es_ES
dc.description.issue 14 es_ES
dc.relation.senia 298556 es_ES


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