Polyaniline-MnO(2) nanotube hybrid nanocomposite as supercapacitor electrode material in acidic electrolyte

[摘要]：Herein, we report a preparation method of a novel binary hybrid nanocomposite based on polyaniline (PANI) and alpha-MnO(2) nanotubes (MNTs) by in situ polymerization. The polymerization is carried out in acidic medium using alpha-MnO(2) nanotubes as oxidant. A symmetrical supercapacitor is fabricated and the electrochemical performance of the supercapacitor is investigated by cyclic voltammetry (CV), chronopotentiometry (CP) and electrochemical impedance spectroscopy (EIS) techniques using 1.0 M H(2)SO(4) as electrolyte. The nanocomposite shows maximum specific capacitance of 626 F g(-1) and corresponding energy density of 17.8 W h kg(-1), as calculated from the charge-discharge curve at a specific current density of 2 A g(-1) in the potential range 0-0.7 V.

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