Electrochemical impedance studies of hybrids of perfluorosulfonic acid ionomer and silicon oxide by sol-gel reaction from solution

dc.creatorZoppi, RA
dc.creatorNunes, SP
dc.date1998
dc.date11383
dc.date2014-12-02T16:31:20Z
dc.date2015-11-26T16:46:34Z
dc.date2014-12-02T16:31:20Z
dc.date2015-11-26T16:46:34Z
dc.date.accessioned2018-03-28T23:32:27Z
dc.date.available2018-03-28T23:32:27Z
dc.identifierJournal Of Electroanalytical Chemistry. Elsevier Science Sa, v. 445, n. 41671, n. 39, n. 45, 1998.
dc.identifier0022-0728
dc.identifierWOS:000073249600006
dc.identifier10.1016/S0022-0728(97)00513-5
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/65170
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/65170
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/65170
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1274567
dc.descriptionHybrids of Nafion (R) and silica were prepared from solution, growing the inorganic phase by hydrolysis/condensation of alkoxy silanes. Using tetraethoxysilane (TEOS) as the inorganic precursor, transparent and rigid films were obtained. Substituting part of the TEOS (20 wt% substitution) by 1,1,3,3 tetramethyl-1,3-diethoxydisiloxane (TMDES) more flexible films were obtained. These films were translucent and showed a phase segregation which was clearly observed by transmission electron microscopy. The ionic conductivity of the hybrids was measured by electrochemical impedance spectroscopy using two stainless steel electrodes, a frequency range of 0.1 to 10(5) Hz, and temperatures from 25 to 100 degrees C. Samples were also characterized by modulated differential scanning calorimetry. (C) 1998 Elsevier Science S.A. All rights reserved.
dc.description445
dc.description41671
dc.description39
dc.description45
dc.languageen
dc.publisherElsevier Science Sa
dc.publisherLausanne
dc.publisherSuíça
dc.relationJournal Of Electroanalytical Chemistry
dc.relationJ. Electroanal. Chem.
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectionic conductivity
dc.subjectNafion (R)
dc.subjecthybrid materials
dc.subjectcomposites
dc.subjectConducting-polymer Electrodes
dc.subjectTransport-properties
dc.subjectLithium Perchlorate
dc.subjectIonic-conductivity
dc.subjectMembranes
dc.subjectSystems
dc.subjectProton
dc.subjectCharge
dc.titleElectrochemical impedance studies of hybrids of perfluorosulfonic acid ionomer and silicon oxide by sol-gel reaction from solution
dc.typeArtículos de revistas


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