Synthesis of 9H-carbazole-9-carbothioic methacrylic thioanhydride, electropolymerization, characterization and supercapacitor applications

Abstract

A novel organic molecule of 9H-carbazole-9-carbothioic methacrylic thioanhydride (CzCS(2)metac) was synthesized by incorporating CS2 and methacrylate groups into the carbazole monomer structure. CzCS(2)metac was characterized by FTIR, H-1-NMR and C-13-NMR spectroscopy. CzCS(2)metac was electropolymerized in 0.1 M tetraethylammonium tetrafluoroborate (TEABF(4))/acetonitrile (CH3CN) on glassy carbon electrode (GCE). The characterization of the electrocoated P(CzCS(2)metac)/CFME thin film was studied by various techniques, such as cyclic voltammetry, scanning electron microscopy-energy-dispersive X-ray analysis and electrochemical impedance spectroscopy. The specific capacitance (C (sp)) of P(CzCS(2)metac)/MWCNT/GCE in the scan rate of 20 mV s(-1) (C (sp) = 38.48 F g(-1) from area formula, C (sp) = 38.52 F g(-1) from charge formula) was increased similar to 15.66 and similar to 15.64 times in area and charge formulas compared to P(CzCS(2)metac)/GCE (C (sp) = 2.46 F g(-1) from area and charge formulas). The same results were also obtained from Nyquist graphs. The specific capacitance value of composite film (C (sp) = 1.09 x 10(-3) F) is similar to 15.66 times higher than the polymer film (C (sp) = 6.92 x 10(-5) F). The composite film may be used as supercapacitor electrode material in energy storage devices.