Mostrar el registro sencillo del ítem
dc.contributor.author | González-Guisasola, C. | es_ES |
dc.contributor.author | Ribes-Greus, A. | es_ES |
dc.date.accessioned | 2020-04-28T06:02:17Z | |
dc.date.available | 2020-04-28T06:02:17Z | |
dc.date.issued | 2018-05 | es_ES |
dc.identifier.issn | 0142-9418 | es_ES |
dc.identifier.uri | http://hdl.handle.net/10251/141648 | |
dc.description.abstract | [EN] Composite membranes obtained from Poly(vinyl Alcohol) (PVA) with sulfosuccinic acid (SSA) as crosslinking agent, and two different proportions of graphene oxide (GO), were prepared to be used in Proton Exchange Membrane Fuel Cells (PEMFCs). The superficial micrographs from transmission electron microscopy (TEM) confirmed a good dispersion of GO. Fourier Transform Infrared spectroscopy (FTIR) was used to evaluate the final chemical structure. Differential Scanning Calorimetry (DSC) showed that glass transition and crystalline phase were not present in the cross-linked PVA/SSA/GO composites membranes. Thermogravimetric analysis (TGA) demonstrated that the addition of GO reduced the moisture content and increased the thermal stability of the membranes. The electrical properties of PVA/SSA and PVA/SSA/GO composite membranes and the effect of GO concentration were evaluated by means of dielectric spectra in a broad range of temperatures and frequencies. The dielectric permittivity of these membranes was significantly promoted at low filler concentration due to an interfacial polarization effect. From the analysis of the dielectric relaxation spectrum, it can be deduced that the origin of the associated molecular movements is intramolecular and occurs in the working range of the PMEFC. In addition, the direct current conductivity, the protonic conductivity, and the polarization currents were correlated to the power produced in a hydrogen monocell. It was observed that low and no high GO concentrations of filler in PVA/SSA composite membranes enhanced their performance. The systematic characterization procedure based on the study of dielectric spectra and conductivity allowed to establish a potential approach to control the addition of GO in the design of other composite membranes for PEMFC with improved properties. | es_ES |
dc.description.sponsorship | The authors would like to thank Dr. Roberto Teruel Juanes and Dr. Victor Saenz de Juano for their advice in the treatment of results. The authors are also thankful to Generalitat Valenciana and the European Social Fund for the Santiago Grisolia scholarship, GRISOLIA/2013/031, and the Spanish Ministry of Science and Innovation for the concession of Research Project ENE2014-53734-C2-1-R. | es_ES |
dc.language | Inglés | es_ES |
dc.publisher | Elsevier | es_ES |
dc.relation.ispartof | Polymer Testing | es_ES |
dc.rights | Reconocimiento - No comercial - Sin obra derivada (by-nc-nd) | es_ES |
dc.subject | Poly(vinyl alcohol) | es_ES |
dc.subject | Nanocomposite membrane | es_ES |
dc.subject | Graphene Oxide (GO) | es_ES |
dc.subject | Dielectric relaxation spectra | es_ES |
dc.subject | Protonic conductivity | es_ES |
dc.subject | Proton Exchange Menbrane Fuel Cell (PEMFC) | es_ES |
dc.subject.classification | MAQUINAS Y MOTORES TERMICOS | es_ES |
dc.title | Dielectric Relaxations and Conductivity of Crosslinked PVA/SSA/GO Composite Membranes for Fuel Cells | es_ES |
dc.type | Artículo | es_ES |
dc.identifier.doi | 10.1016/j.polymertesting.2018.01.024 | es_ES |
dc.relation.projectID | info:eu-repo/grantAgreement/GVA//GRISOLIA%2F2013%2F031/ | es_ES |
dc.relation.projectID | info:eu-repo/grantAgreement/MINECO//ENE2014-53734-C2-1-R/ES/DISEÑO Y VALIDACION DE MEMBRANAS CON CONTROL MORFOLOGICO PARA SU USO EN PILAS DE COMBUSTIBLE DE BAJA TEMPERATURA SOSTENIBLES EN VEHICULOS EFICIENTES NO TRIPULADOS/ | es_ES |
dc.rights.accessRights | Abierto | es_ES |
dc.contributor.affiliation | Universitat Politècnica de València. Departamento de Máquinas y Motores Térmicos - Departament de Màquines i Motors Tèrmics | es_ES |
dc.description.bibliographicCitation | González-Guisasola, C.; Ribes-Greus, A. (2018). Dielectric Relaxations and Conductivity of Crosslinked PVA/SSA/GO Composite Membranes for Fuel Cells. Polymer Testing. 67:55-67. https://doi.org/10.1016/j.polymertesting.2018.01.024 | es_ES |
dc.description.accrualMethod | S | es_ES |
dc.relation.publisherversion | https://doi.org/10.1016/j.polymertesting.2018.01.024 | es_ES |
dc.description.upvformatpinicio | 55 | es_ES |
dc.description.upvformatpfin | 67 | es_ES |
dc.type.version | info:eu-repo/semantics/publishedVersion | es_ES |
dc.description.volume | 67 | es_ES |
dc.relation.pasarela | S\351733 | es_ES |
dc.contributor.funder | European Social Fund | es_ES |
dc.contributor.funder | Generalitat Valenciana | es_ES |
dc.contributor.funder | Ministerio de Economía, Industria y Competitividad | es_ES |