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Surface Analyses of PVDF/NMP/[EMIM][TFSI] Solid Polymer Electrolyte
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SYSNO ASEP 0545553 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Surface Analyses of PVDF/NMP/[EMIM][TFSI] Solid Polymer Electrolyte Author(s) Sedlák, P. (CZ)
Sobola, Dinara (UFM-A) ORCID, RID
Gajdos, A. (CZ)
Dallaev, R. (CZ)
Nebojsa, A. (CZ)
Kuberský, P. (CZ)Number of authors 6 Article number 2678 Source Title Polymers. - : MDPI - ISSN 2073-4360
Roč. 13, č. 16 (2021)Number of pages 16 s. Language eng - English Country CH - Switzerland Keywords ionic liquid ; poly(vinylidene fluoride) ; 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ; current fluctuations ; phase-transition ; anion type ; raman ; beta ; crystallization ; pvdf ; solid polymer electrolyte ; imidazolium ionic liquids ; poly-(vinylidene fluoride) ; crystallinity ; solvent evaporation ; Raman spectroscopy ; Fourier transform infrared spectroscopy ; X-ray photoelectron spectroscopy ; secondary ion mass spectroscopy Subject RIV CD - Macromolecular Chemistry OECD category Polymer science Method of publishing Open access Institutional support UFM-A - RVO:68081723 UT WOS 000689760700001 EID SCOPUS 85113170453 DOI https://doi.org/10.3390/polym13162678 Annotation Thermal treatment conditions of solid polymer polymer electrolyte (SPE) were studied with respect to their impact on the surface morphology, phase composition and chemical composition of an imidazolium ionic-liquid-based SPE, namely PVDF/NMP/[EMIM][TFSI] electrolyte. These investigations were done using scanning electron microscopy, Raman spectroscopy, Fourier transform infrared spectroscopy, differential scanning calorimetry as well as X-ray photoelectron spectroscopy and time-of-flight secondary ion mass spectroscopy. A thoroughly mixed blend of polymer matrix, ionic liquid and solvent was deposited on a ceramic substrate and was kept at a certain temperature for a specific time in order to achieve varying crystallinity. The morphology of all the electrolytes consists of spherulites whose average diameter increases with solvent evaporation rate. Raman mapping shows that these spherulites have a semicrystalline structure and the area between them is an amorphous region. Analysis of FTIR spectra as well as Raman spectroscopy showed that the beta-phase becomes dominant over other phases, while DSC technique indicated decrease of crystallinity as the solvent evaporation rate increases. XPS and ToF-SIMS indicated that the chemical composition of the surface of the SPE samples with the highest solvent evaporation rate approaches the composition of the ionic liquid. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2022 Electronic address https://www.mdpi.com/2073-4360/13/16/2678
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