Engineering energy storage properties of rGO based Fe2O3/CuO/PANI quaternary nanohybrid as an ideal electroactive material for hybrid supercapacitor application

Abstract

Here, we report the synthesis of novel electrode material rGO@ Fe2O3/CuO/PANI by a facile hydrothermal route. PANI chains are deposited on the rGO@ Fe2O3/CuO by in situ chemical oxidative polymerization route to acquire the quaternary nano composite powders. The nanocomposite active electrode composed of rGO@Fe2O3/CuO/PANI (1%, 3%, 5%) reveals a higher specific capacitance of 1210 Fg−1 and outstanding cycle stability at 1 Ag−1. Electrochemical studies divulge a greatest specific capacitance in 1255 Fg−1 at a sweep rate of 5mVs−1. The ratio of rGO content rises also improve the charge transfer and enhances the redox reactions kinetics according to EIS investigation. Succeeding 1000 cycles of electrochemical testing, the nanohybrid electrode manifesting marvellous cycling stability, diminishes just 4% of its initial capacitance (during the first cycle). To accomplish the outstanding gravimetric capacitance and marvellous cyclic stability, the rGO@ Fe2O3/CuO/PANI nanostructure of the nanohybrid decorated directly on the Nickel Foam whose ion diffusion channel has been reduced and more active sites are brought in to contact with nanocomposite. As a result, fascinating performance of supercapacitor rGO@ Fe2O3/CuO/PANI nanocomposites is deemed as a viable active electrode material for further endows in energy storage device application.