Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/21087

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dc.contributor.authorRodrigues, L. C.-
dc.contributor.authorFernandes, M.-
dc.contributor.authorZea Bermudez, V. de-
dc.contributor.authorSilva, Maria Manuela-
dc.contributor.authorSmith, Michael John-
dc.date.accessioned2012-11-30T14:45:27Z-
dc.date.available2012-11-30T14:45:27Z-
dc.date.issued2012-07-
dc.date.submitted2012-04-22-
dc.identifier.issn0167-2738por
dc.identifier.urihttp://hdl.handle.net/1822/21087-
dc.description.abstractHybrid electrolytes produced by the sol-gel process were obtained by doping a di-urea cross-linked POE/siloxane hybrid host framework (d-U(2000)) with lithium hexafluoroantimonate (LiSbF6). Flexible, transparent xerogel films with ∞ > n ≥ 2.5 (where n, composition, represents the molar ratio of oxyethylene units OCH2CH2 per Li+ ion), thermally stable to at least 200 ºC, were prepared. At 30 ºC the highest ionic conductivity of all the electrolytes prepared was 1.32x10-5 Scm-1 for n = 30. The electrochemical stability windows of these materials span at least 6.0 V. Samples with n < 200 are amorphous, homogeneous and non-porous. Crystallites of POE are formed in the most dilute electrolyte (n = 200). The guest Li+ ions were shown to coordinate to the oxygen atoms of the urea carbonyl groups over the entire range of salt concentration. The great majority of the SbF6- ions interact with the Li+ ions. Contact ion pairs were detected only at n = 200. Trace amounts of “free” anions exist in all electrolyte samples.por
dc.description.sponsorshipFundação para a Ciência e Tecnologia (FCT)por
dc.language.isoengpor
dc.publisherElsevierpor
dc.rightsopenAccesspor
dc.subjectXerogelpor
dc.subjectLithium hexafluoroantimonatepor
dc.subjectStructurepor
dc.subjectComplex impedancepor
dc.titleStructural studies of novel di-ureasil ormolytes doped with lithium hexafluoroantimonatepor
dc.typearticlepor
dc.peerreviewedyespor
sdum.publicationstatuspublishedpor
oaire.citationStartPage7por
oaire.citationEndPage14por
oaire.citationTitleSolid State Ionicspor
oaire.citationVolume226por
dc.identifier.doi10.1016/j.ssi.2012.07.012por
dc.subject.wosScience & Technologypor
sdum.journalSolid State Ionicspor
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