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 of a hybrid heterostructure consisting of reduced graphene oxide (rGO) and nanoparticles of manganese doped nickel oxide. The Mn doped NiO/rGO material characteristics were effectively studied by various analytical methods. The Mn doped NiO@rGO exhibits exceptional electrochemical features as an electrocatalytic material supercapacitor, including extremely high specific capacitance (Cs) of 1780.32 F g–1 at 1.0 A g–1, ideal rate capability of 1720 F g–1, and exceptional life cycle of 4% (96%) capacitance rate decline over 6000 cycles. Importantly, the kinetic analysis shows that capacitance dominates the diffusion process throughout the charge storage mechanism. The hybrid nanocomposite exhibited stable behavior for 60 h compared with the benchmark (RuO2). As a result, the Mn doped NiO@rGO electrode design might be considered a potential electrode with high Cs for future energy conversion equipment.