Abstract:

One-dimensional nanotubular MnO2/PPy/PANI ternary composites were prepared by in-situ chemical oxidative polymerization of pyrrole in the host of MnO2 and PANI, using methyl orange/FeCl3 as a reactive self-degraded soft-template. Their morphologies and microstructures were characterized by X-ray diffraction(XRD) analysis, infrared analysis, transmission electron microscopy(TEM). The electrochemical properties of the ternary composites for electrochemical capacitors were investigated by cyclic voltammogram(CV), galvanostatic charge/discharge tests. The results indicated that the ternary composites were characterized with greater specific capacitance than the binary composite of MnO2/PPy due to the synergy effect of PPy, PANI, and MnO2. Hollow tube-like structure of PPy with high surface area might enhance the specific capacitance. The materials had also given a good charge-discharge cycle performance and a maximum specific capacitance of 458.4 F/g was obtained.

Key words: MnO2/PPy/PANI, nanotube composites materials, electrochemical capacitor