Abstract
A mild and room temperature route has been developed for the synthesis of Mn3O4 nanoparticles by mixing the aqueous solution of MnSO4 and Na2CO3. The Mn3O4 products were investigated by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM) and electrochemical tests. A specific capacitance of 205Fg−1 was obtained for Mn3O4 nanoparticles at a current density of 0.5Ag−1 in 1M Na2SO4 electrolyte solution. The Mn3O4 nanoparticles exhibited a good rate capability and electrochemical stability. In addition, γ-MnO2 nanorods were prepared from Mn3O4 nanoparticles by a simple hydrothermal treatment at 120°C under the acidic condition.
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