Surface Analyses of PVDF/NMP/[EMIM][TFSI] Solid Polymer Electrolyte
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 u...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-08-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/13/16/2678 |
| _version_ | 1797522273558593536 |
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| author | Petr Sedlak Dinara Sobola Adam Gajdos Rashid Dallaev Alois Nebojsa Petr Kubersky |
| author_facet | Petr Sedlak Dinara Sobola Adam Gajdos Rashid Dallaev Alois Nebojsa Petr Kubersky |
| author_sort | Petr Sedlak |
| collection | DOAJ |
| description | 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 β-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. |
| first_indexed | 2024-03-10T08:27:04Z |
| format | Article |
| id | doaj.art-1de6a37e9c904ad9bd9bf7b48954c655 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T08:27:04Z |
| publishDate | 2021-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-1de6a37e9c904ad9bd9bf7b48954c6552023-11-22T09:22:43ZengMDPI AGPolymers2073-43602021-08-011316267810.3390/polym13162678Surface Analyses of PVDF/NMP/[EMIM][TFSI] Solid Polymer ElectrolytePetr Sedlak0Dinara Sobola1Adam Gajdos2Rashid Dallaev3Alois Nebojsa4Petr Kubersky5Faculty of Electrical Engineering and Communications, Brno University of Technology, Technicka 10, 616 00 Brno, Czech RepublicFaculty of Electrical Engineering and Communications, Brno University of Technology, Technicka 10, 616 00 Brno, Czech RepublicFaculty of Electrical Engineering and Communications, Brno University of Technology, Technicka 10, 616 00 Brno, Czech RepublicFaculty of Electrical Engineering and Communications, Brno University of Technology, Technicka 10, 616 00 Brno, Czech RepublicCentral European Institute of Technology (CEITEC), Brno University of Technology, Purkynova 123, 612 00 Brno, Czech RepublicResearch and Innovation Centre for Electrical Engineering (RICE), Faculty of Electrical Engineering, University of West Bohemia, Univerzitni 8, 301 00 Plzen, Czech RepublicThermal 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 β-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.https://www.mdpi.com/2073-4360/13/16/2678solid polymer electrolyteimidazolium ionic liquidspoly-(vinylidene fluoride)crystallinitysolvent evaporationRaman spectroscopy |
| spellingShingle | Petr Sedlak Dinara Sobola Adam Gajdos Rashid Dallaev Alois Nebojsa Petr Kubersky Surface Analyses of PVDF/NMP/[EMIM][TFSI] Solid Polymer Electrolyte Polymers solid polymer electrolyte imidazolium ionic liquids poly-(vinylidene fluoride) crystallinity solvent evaporation Raman spectroscopy |
| title | Surface Analyses of PVDF/NMP/[EMIM][TFSI] Solid Polymer Electrolyte |
| title_full | Surface Analyses of PVDF/NMP/[EMIM][TFSI] Solid Polymer Electrolyte |
| title_fullStr | Surface Analyses of PVDF/NMP/[EMIM][TFSI] Solid Polymer Electrolyte |
| title_full_unstemmed | Surface Analyses of PVDF/NMP/[EMIM][TFSI] Solid Polymer Electrolyte |
| title_short | Surface Analyses of PVDF/NMP/[EMIM][TFSI] Solid Polymer Electrolyte |
| title_sort | surface analyses of pvdf nmp emim tfsi solid polymer electrolyte |
| topic | solid polymer electrolyte imidazolium ionic liquids poly-(vinylidene fluoride) crystallinity solvent evaporation Raman spectroscopy |
| url | https://www.mdpi.com/2073-4360/13/16/2678 |
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