Rapid synthesis of Mn3O4 by in-situ redox method and its capacitive performances

A quick and easy method to synthesize nanostructured Mn3O4 through an in-situ redox method was presented. KMnO4 was used as the precursor and chitosan was added during the process. The as-prepared materials were characterized by using X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM), transmission electron microscopy (TEM) and Fourier transform infrared spectra (FT-IR). The electrochemical properties of Mn3O4 based electrodes were systematically studied using cyclic voltammetry and chronopotentiometry in 1 M Na2SO4 aqueous solution electrolyte. It exhibited a high specific capacitance of 278 F/g at 2.5 mA.