A cholesterol based imidazolium ionic liquid crystal: synthesis, characterisation and its dual application as an electrolyte and electrode material
| Autor: | S. Umadevi, S. Selvam, R. Mangaiyarkarasi, V. Ganesh |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Graphene
Mesophase 02 engineering and technology General Chemistry Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Catalysis 0104 chemical sciences law.invention chemistry.chemical_compound chemistry Chemical engineering law Ionic liquid Electrode Materials Chemistry Cyclic voltammetry 0210 nano-technology Electrochemical window |
| Zdroj: | New Journal of Chemistry. 43:1063-1071 |
| ISSN: | 1369-9261 1144-0546 |
| DOI: | 10.1039/c8nj04988b |
| Popis: | A new ionic liquid crystal (ILC) containing cholesterol and bearing a terminal imidazolium moiety was synthesised and its mesophase behaviour was investigated by polarising optical microscopy (POM), differential scanning calorimetry (DSC) and X-ray diffraction (XRD) studies. The ILC displayed an intercalated lamellar mesophase having a wide phase range. Cyclic voltammetry studies of the synthesised ILC revealed electrochemical stability with a good electrochemical window. Further, the electrochemical performance of the ILC was evaluated as an electrolyte (0.5% in ethanol) for supercapacitor applications using a three electrode system consisting of a graphene oxide–manganese dioxide (100 μm) coated carbon fiber electrode, silver–silver chloride (Ag–AgCl) reference and platinum foil counter electrodes. Among three different ratios of graphene oxide–manganese dioxide (1 : 1, 1 : 0.5, and 0.5 : 1) investigated, the electrode containing 0.5 : 1 wt% graphene oxide–manganese dioxide over carbon fiber showed good capacitive behaviour with a specific capacitance of 157.5 F g−1 at a constant current density of 0.5 A g−1 along with a good cyclic stability. In addition, the ILC was also studied as an electrode material in combination with carbon paste for investigating electron transfer reactions. |
| Databáze: | OpenAIRE |
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