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 ...
