The Electrode Electrochemical Performance of MnO₂ with two Component Conductive Agent

The MnO₂ powder was prepared by the method of anodic electrodeposition as an electrode active material,and mixed with two-component conductive agent which including a few Multi-walled carbon nanotubes and Acetylene black to fabricate the MnO₂ electrodes for supercapacitors. The effect of two-component conductive agent was investigated by Scanning Electron Microscope and cyclic voltammetry,constant current charging-discharging,electrochemical test and so on. The results show that Hs100 in two-component conductive agent making the conductive agent more uniform. Electrode has a typical property of capacitance,and also has a good reversible property. With increasing of scan rate,compared with single conductive agent electrode,the electrode with two-component conductive agent had a higher capacity retention rate. After 1000 recharge cycles,the electrode which contained two-component conductive agent had a good stability of capacity and resistance,and the retention rate could exceed 96%.