Controllable synthesis of MnO(2)/polyaniline nanocomposite and its electrochemical capacitive property

Polyaniline (PANI) and MnO(2)/PANI composites are simply fabricated by one-step interfacial polymerization. The morphologies and components of MnO(2)/PANI composites are modulated by changing the pH of the solution. Formation procedure and capacitive property of the products are investigated by XRD, FTIR, TEM, and electrochemical techniques. We demonstrate that MnO(2) as an intermedia material plays a key role in the formation of sample structures. The MnO(2)/PANI composites exhibit good cycling stability as well as a high capacitance close to 207 F g(−1). Samples fabricated with the facile one-step method are also expected to be adopted in other field such as catalysis, lithium ion battery, and biosensor.