Farzaneh Abdollahi - Chemistry Department, Faculty of Science, University of Guilan, , Rasht, IranP.O. Box: ۱۹۱۴–۴۱۳۳۵
Reza Ansari - Chemistry Department, Faculty of Science, University of Guilan, , Rasht, IranP.O. Box: ۱۹۱۴–۴۱۳۳۵
Mona Farahpour - Chemistry Department, Faculty of Science, University of Guilan, , Rasht, IranP.O. Box: ۱۹۱۴–۴۱۳۳۵

In recent years, supercapacitors have attracted significant attention due to the fastcharging/discharging rate, high power density, and long cycle life provide a viable solution toaddress the increasing demand. In the following study, the CoS۲/polyaniline (PANI) electrodegrown on nickel foam (NF) have been successfully constructed through a facile method and usedas electrodes for a high-performance pseudo capacitor. Firstly, CoS۲ salt was fabricated onto nickelfoam (NF) by a hydrothermal method. Then, PANI was formed in situ on the surface of the CoS۲via an electropolymerization route to achieve high specific capacitance, and long-term life forrequired supercapacitor electrode applications. The electrochemical properties of theseCoS۲/PANI/NF electrodes were studied using cyclic voltammetry (CV), galvanostatic chargedischargeanalysis (GCD), and electrochemical impedance spectroscopy (EIS) techniques. Thehighest specific capacitance obtained by the prepared electrode was ۲۴۴۳.۳۳ F g –۱ at a currentdensity of ۱ A g –۱, and ۹۳.۰۴% specific capacitance retention after ۳۰۰۰ charge/discharge cyclesat a current density value of ۸ A g –۱. Moreover, a supercapacitor was fabricated using CoS۲/PANIon NF as the positive electrode (cathode), and activated carbon on Ni foam (AC/NF) as thenegative electrode (anode) exhibited high specific capacitance of ۱۴۸.۵ F g –۱ at a current densityof ۱ A g –۱. The introduced composite electrode based on PANI in this research showed excellentelectrochemical performances to be used as electrode material in supercapacitors as novel energystorage devices.

Energy storage, Supercapacitor, Hydrothermal method, Polyaniline, cobalt disulfide