Poly(9H-Carbazole-9-Carbothioic Dithioperoxyanhydride) Formation and Capacitor Study

Abstract

9H-Carbazole-9-carbothioic dithioperoxyanhydride (2CS2Cz) was chemically synthesized in our previous study. In this work, specific (Csp) and double layer capacitances (Cdl) of the electrocoated poly(9H-carbazole-9-carbothioic dithioperoxyanhydride) P(2CS2Cz) films were obtained on glassy carbon electrode (GCE). The polymers were characterized by cyclic voltammetry (CV), Fourier transform infrared reflectance-attenuated total reflection spectroscopy (FTIR-ATR), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), and electrochemical impedance spectroscopy (EIS). Polymer characterizations of FTIR-ATR, and SEM-EDX analysis were taken on carbon fiber microelectrodes (CFMEs). The initial monomer concentration of 2CS2Cz was taken as 0.25, 0.5, and 1.0 mM in 0.1 M sodium perchlorate (NaClO4)/acetonitrile (CH3CN). The capacitance behavior of P(2CS2Cz)/GCE is shown by Nyquist, Bode-magnitude, Bode-phase, and Admittance plots relationship. The low frequency capacitance (CLF = 0.52 mF cm−2) and double layer capacitance (Cdl = 571 µF) were obtained for [2CS2Cz]0 = 0.25 mM and 1 mM, respectively.