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dc.contributor.authorSedlák, Petr
dc.contributor.authorGajdoš, Adam
dc.contributor.authorMacků, Robert
dc.contributor.authorMajzner, Jiří
dc.contributor.authorHolcman, Vladimír
dc.contributor.authorSedláková, Vlasta
dc.contributor.authorKuberský, Petr
dc.date.accessioned2021-03-15T11:00:31Z-
dc.date.available2021-03-15T11:00:31Z-
dc.date.issued2020
dc.identifier.citationSEDLÁK, P. GAJDOŠ, A. MACKŮ, R. MAJZNER, J. HOLCMAN, V. SEDLÁKOVÁ, V. KUBERSKÝ, P.The effect of thermal treatment on ac/dc conductivity and current fluctuations of PVDF/NMP/[EMIM] [TFSI] solid polymer electrolyte. Scientific Reports, 2020, roč. 10, č. 1, s. „21140-1" - „21140-12". ISSN 2045-2322.cs
dc.identifier.issn2045-2322
dc.identifier.uri2-s2.0-85097095469
dc.identifier.urihttp://hdl.handle.net/11025/42958
dc.format12 s.cs
dc.format.mimetypeapplication/pdf
dc.language.isoenen
dc.publisherNature Researchen
dc.relation.ispartofseriesScientific Reportsen
dc.rights© Nature Researchen
dc.titleThe effect of thermal treatment on ac/dc conductivity and current fluctuations of PVDF/NMP/[EMIM] [TFSI] solid polymer electrolyteen
dc.typečlánekcs
dc.typearticleen
dc.rights.accessopenAccessen
dc.type.versionpublishedVersionen
dc.description.abstract-translatedThe experimental study deals with the investigation of the effect of diverse crystallinity of imidazolium ionic-liquid-based SPE on conductivity and current fluctuations. The experimental study was carried out on samples consisting of [EMIM][TFSI] as ionic liquid, PVDF as a polymer matrix and NMP as a solvent. After the deposition, the particular sample was kept at an appropriate temperature for a specific time in order to achieve different crystalline forms of the polymer in the solvent, since the solvent evaporation rate controls crystallization. The ac/dc conductivities of SPEs were investigated across a range of temperatures using broadband dielectric spectroscopy in terms of electrical conductivity. In SPE samples of the higher solvent evaporation rate, the real parts of conductivity spectra exhibit a sharper transition during sample cooling and an increase of overall conductivity, which is implied by a growing fraction of the amorphous phase in the polymer matrix in which the ionic liquid is immobilized. The conductivity master curves illustrate that the changing of SPEs morphology is reflected in the low frequency regions governed by the electrode polarization effect. The dc conductivity of SPEs exhibits Vogel–Fulcher–Tammann temperature dependence and increases with the intensity of thermal treatment. Spectral densities of current fluctuations showed that flicker noise, thermal noise and shot noise seems to be major noise sources in all samples. The increase of electrolyte conductivity causes a decrease in bulk resistance and partially a decrease in charge transfer resistance, while also resulting in an increase in shot noise. However, the change of electrode material results in a more significant change of spectral density of current fluctuations than the modification of the preparation condition of the solid polymer electrolyte. Thus, the contact noise is considered to contribute to overall current fluctuations across the samples.en
dc.subject.translatedsolid polymer electrolyteen
dc.subject.translatedcurrent fluctuationsen
dc.subject.translatedPoly(vinylidene fluoride)en
dc.subject.translatedimidazolium ionic liquiden
dc.subject.translatedsolvent evaporation temperatureen
dc.subject.translatedconductivityen
dc.subject.translatedVogel-Fulcher-Tammann dependenceen
dc.subject.translatedinterdigital electrodeen
dc.identifier.doi10.1038/s41598-020-78363-6
dc.type.statusPeer-revieweden
dc.identifier.document-number615394300140
dc.identifier.obd43931434
dc.project.IDGA18-19104S/Vliv krystalinity polymerního elektrolytu a morfologie uhlíkové elektrody na transport elektrického náboje a jeho fluktuace v elektrochemických plynových senzorechcs
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