Corresponding Author

Kun SHEN(1353278219@qq.com)


In this work, the manganese dioxide (MnO2) materials were prepared by solution approach at low temperature, thermal decomposition and electrochemical deposition. The actived carbon (AC) and MnO2 composite electrodes were used for aqueous supercapacitors. The morphologies and structures of the prepared materials were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM), and the electrochemical behaviors were tested by cyclic voltammetry (CV) and galanostatic charge-discharge tests. Electrochemical test data show that the maximum specific capacitances of 151, 172 and 141 F•g-1 were obtained with the contents of MnO2 being 70, 60 and 70% in the composites, respectively. However, the influence of MnO2powder on the electrode impedance was not straightforward.

Graphical Abstract


aqueous asymmetic super capacitor, manganese oxide, activated carbon electrode

Publication Date


Online Available Date



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