Effects of the Mixing and Aging Process on the Morphologies and Electrochemical Properties of Co/Fe Co-doped MnO2

Fe/Co co-doped γ-MnO2 was synthesized by a facile chemical method without using any surfactant at room temperature in this study. The effects of the mixing and aging process on the electrochemical properties of Fe/Co co-doped MnO2 materials were investigated by cyclic voltammograms (CV), galvanostatic charge/discharge (GCD) and electrochemical impedance spectroscopy (EIS). The Fe/Co co-doped MnO2 material had a specific capacitance (SC) of 214 F g−1 at a scan rate of 2 mV s−1 and good cycling stability, which was better than that produced via the drop-adding method in a stirred mixer and further confirmed the intensifying effect of the T-mixer on the mixing process. Therefore, the electrochemical properties of the co-doped MnO2 could be significantly improved by the T-mixer and the stirring aging method.