Supercapacitor studies of activated carbon functionalized with poly(ethylene dioxythiophene): Effects of surfactants, electrolyte concentration on electrochemical properties

Electropolymerization of poly(ethylene dioxythiophene) (PEDOT) on activated carbon (AC) was per-formed using different surfactants such as anionic surfactant (sodium dodecyl sulfate), protonic surfac-tant (camphor sulphonic acid) and non-ionic surfactant (Triton) in 0.1 M H2SO4. The effects ofconcentration of different surfactants for lectrodeposition of PEDOT on AC were analyzed using electro-chemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and SEM techniques. Supercapacitors(SC) were abricated using AC/PEDOT composite electrodes and 0.1 M H2SO4 as an electrolyte. The specificcapacitance (Cs) values were calculated using CV at different concentrations of surfactants, electrolytesand variation of potential. The electrolyte containing 0.1 M H2SO4 and 0.02 M camphor sulphonic acidshowed to have the highest specific capacitance value of 240 Fg1 than other surfactant based SCs.Galvanostatic charge/discharge at varying current density were performed on SCs containing differentsurfactant based electrodes to study their cyclic stability.