Facile Development of Mn Doped NiO Nanoarrays Supported on a Reduced Graphene Oxide Nanocomposite as a Supercapacitor

In this study, we describe the effective production ofa hybridheterostructure consisting of reduced graphene oxide (rGO) and nanoparticlesof manganese doped nickel oxide. The Mn doped NiO/rGO material characteristicswere effectively studied by various analytical methods. The Mn dopedNiO@rGO exhibits exceptional electrochemical features as an electrocatalyticmaterial supercapacitor, including extremely high specific capacitance(C (s)) of 1780.32 F g(-1) at 1.0 A g(-1), ideal rate capability of 1720 Fg(-1), and exceptional life cycle of 4% (96%) capacitancerate decline over 6000 cycles. Importantly, the kinetic analysis showsthat capacitance dominates the diffusion process throughout the chargestorage mechanism. The hybrid nanocomposite exhibited stable behaviorfor 60 h compared with the benchmark (RuO2). As a result,the Mn doped NiO@rGO electrode design might be considered a potentialelectrode with high C (s) for future energyconversion equipment.