Asymmetric 2032 coin cell Supercapbattery Device Applications of rGO/Co3O4/Polypyrrole and rGO/Copper oxide Nanocomposites

Abstract

Abstract Supercapacitors and batteries are used as energy storage devices. A new designed electrode materials including hybrid nanocomposites, such as cobalt (II, III) oxide (Co3O4), copper (II) oxide (CuO), polypyrrole (PPy) and reduced graphene oxide (rGO). In this study, rGO, Co3O4 and PPy were constructed in one side of electrode. Then rGO and CuO have been obtained for another side of electrode for 2032 coin cell for asymmetric supercapbattery device. The characterization of rGO/Co3O4/PPy nanocomposite was presented for our previous studies. In this work, the characterization of rGO/CuO nanocomposite was given as FTIR-ATR, BET, TGA-DTA and SEM-EDX analysis. The asymmetric rGO/Co3O4/PPy//rGO/CuO supercapbattery resulted a good energy and power density of E = 3.01 Wh×kg− 1 for [rGO]o/[Co3O4]o/[PPy]o= 1:5:10 and P = 146.49 W×kg− 1 for [rGO]o/[Co3O4]o/[PPy]o= 1:5:1. The highest capacitance retention was obtained as 89.12% for [rGO]o/[Co3O4]o/[PPy]o= 1:5:10 after 1000 times charge-discharge cycles by CV method using 2032 coin cell. The porous structure of GO and addition of conductive carbon black with other components supplied a positive electrochemical performance of supercapbattery. Asymmetric supercapbattery design of rGO/Co3O4/PPy and rGO/CuO may give a good opportunity for energy storage devices.