Structural properties and supercapacitive performance evaluation of the nickel oxide/graphene/polypyrrole hybrid ternary nanocomposite in aqueous and organic electrolytes

Abstract Recently, hybrid supercapacitors have attracted tremendous attention as promising energy storage and conversion devices due to their excellent density high power density. In the present work, a novel pioneering ternary nanocomposite of NiO/Gr/PPy was synthesized by low-cost co-precipitation method, followed heat treatment in-situ chemical polymerization. The as-synthesized drop-cast on modified Cu current collector enhance supercapacitive performance stability in electrolyte. results electrochemical characterization 6 M KOH revealed specific capacitance 970.85 F g?1 33.71 Wh kg?1 at 1 A g?1, respectively. This can be attributed synergic effect NiO, Gr, PPy. Moreover, full symmetric cell assembled using this evaluated TEA-BF4/AN. showed 66.17 F g?1 36.76 Wh within 2 V potential window,