超级电容器电极材料－MnO2的制备及其电性能机理研究

Manganese Dioxide was prepared by chemical Co-precipitation．XRD pattern of the resulting power showed that the main crystal structure of the sample wasε-MnO2.Electrochemical measurement shows that the specific capacitance of single electrode is 203.12F/g, after 400th cycles the latter’s capacitance decreases little．The impedance of charge transfer resistances of electrode in the MnO2 electrode system on the cation amount intercalated was studied by means of AC impedance experiments.then we can get the equivalent circuit closed to the experiment data by means of analysis and simulation.So the material is the perfect material for supercapacitors.