Synthetization and electrochemical performance of pomegranate-like ZnMn2O4 porous microspheres

A pomegranate-like ZnMn2O4 sphere electrode material was prepared via co-precipitation and calcination method, and was characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), and electrochemical workstation. Experimental results display that the calcination temperature has a large influence on the morphology of ZnMn2O4 porous microsphere. When the annealed temperature is 600 degrees C, ZnMn2O4 porous microsphere possesses the best electrochemical performance, in which the specific capacitance reaches 447 F/g at a current density of 1 A/g. The excellent electrochemical performances are mainly attributed to the porous structure and large specific surface area, indicated that the pomegranate-like ZnMn2O4 porous microsphere has a potential application in electrode material of supercapacitor. (C) 2020 Elsevier B.V. All rights reserved.