ABSTRACT
MnO2/polypyrrole hollow urchins were synthesized using hollow urchins MnO2 as template, in which it was synthesized by a hydrothermal reaction in the 0.3 M KMnO4 and 0.15 M (NH4)2SO4 solution. The structures and the morphologies of MnO2 and MnO2/Ppy hollow urchins were characterized by Fourier transform infrared spectroscopy, SEM and cyclic voltammogram. The result showed that MnO2 hollow urchins were formed by the nanorods which were 100–300 nm in diameters, having 1–3 μm hollow diameters. The specific capacitance value of MnO2/Ppy hollow urchin was 195.3 F/g at a scan rate of 10 mV/s. Such hollow urchin possessing a large surface may provide a novel electrode material for electrochemical energy storage.
