Solid-state NMR, ionic conductivity, and thermal studies of lithium-doped siloxane-poly(propylene glycol) organic-inorganic nanocomposites

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dc.contributor.authorDe Souza, P. H.
dc.contributor.authorBianchi, R. F.
dc.contributor.authorDahmouche, K. [UNESP]
dc.contributor.authorJudeinstein, P.
dc.contributor.authorFaria, R. M.
dc.contributor.authorBonagamba, T. J.
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUNED/Jataí
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversité Paris-Sud
dc.date.accessioned2014-05-27T11:20:19Z
dc.date.available2014-05-27T11:20:19Z
dc.date.issued2001-11-09
dc.description.abstractHybrid organic-inorganic ionic conductors, also called ormolytes (organically modified electrolytes), were obtained by dissolution of LiClO 4 in siloxane-poly(propylene glycol) matrixes. The dynamic features of these nanocomposites were studied and correlated to their electrical properties. Solid-state nuclear magnetic resonance (NMR) spectroscopy was used to probe the effects of the temperature and nanocomposite composition on the dynamic behaviors of both the ionic species ( 7Li) and the polymer chains ( 13C). NMR, dc ionic conductivity, and DSC results demonstrate that the Li + mobility is strongly assisted by the segmental motion of the polymer chain above its glass transition temperature. The ac ionic conductivity in such composites is explained by use of the random free energy barrier (RFEB) model, which is agreement with their disordered and heterogenous structures. These solid ormolytes are transparent and flexible, and they exhibit good ionic conductivity at room temperature (up to 10 -4 S/cm). Consequently, they are very promising candidates for use in several applications such as batteries, sensors, and electrochromic and photoelectro-chemical devices.en
dc.description.affiliationInstituto de Fisica de São Carlos Universidade de São Paulo, Caixa Postal 369, CEP 13560-970, São Carlos-SP
dc.description.affiliationCentro Federal de Educacüão Tecnológica de Goiás UNED/Jataí, Rua Riachuelo, 2090 - Setor Manuel Graham, CEP: 13580-000, Jataí-GO
dc.description.affiliationInstituto de Química de Araraquara-UNESP, Av. Prof. Francisco Degni s/n, CEP 14800-900, Araraquara-SP
dc.description.affiliationLaboratoire de Chimie Structurale Organique UPRESA CNRS 8074 Université Paris-Sud, 91405 Orsay
dc.description.affiliationUnespInstituto de Química de Araraquara-UNESP, Av. Prof. Francisco Degni s/n, CEP 14800-900, Araraquara-SP
dc.format.extent3685-3692
dc.identifierhttp://dx.doi.org/10.1021/cm011023v
dc.identifier.citationChemistry of Materials, v. 13, n. 10, p. 3685-3692, 2001.
dc.identifier.doi10.1021/cm011023v
dc.identifier.issn0897-4756
dc.identifier.scopus2-s2.0-0034772610
dc.identifier.urihttp://hdl.handle.net/11449/66611
dc.language.isoeng
dc.relation.ispartofChemistry of Materials
dc.relation.ispartofjcr9.890
dc.relation.ispartofsjr4,675
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjectlithium ion
dc.subjectpolypropylene glycol
dc.subjectpropanediol derivative
dc.subjectsiloxane
dc.subjectunclassified drug
dc.subjectcarbon nuclear magnetic resonance
dc.subjectelectrochemistry
dc.subjection conductance
dc.subjectmolecular dynamics
dc.subjectphotochemistry
dc.subjectsynthesis
dc.titleSolid-state NMR, ionic conductivity, and thermal studies of lithium-doped siloxane-poly(propylene glycol) organic-inorganic nanocompositesen
dc.typeArtigo
dcterms.licensehttp://pubs.acs.org/paragonplus/copyright/jpa_form_a.pdf

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