Polyaniline/MnO2 composite with high performance as supercapacitor electrode via pulse electrodeposition

A method of pulse electrodeposition was proposed to synthesize polyaniline (PANI)/MnO2 composite in aniline, H2SO4, and MnSO4 aqueous solution. The PANI/MnO2 composite has rod‐like structure and MnO2 particles are distributed on PANI uniformly. To evaluate the performance of the as‐prepared materials as supercapacitor electrodes, cyclic voltammetry, galvanostatic charge–discharge measurements, and electrochemical impedance spectroscopy were performed. The PANI/MnO2 composite shows a higher specific capacitance (810 F g−1) than pure PANI (662 F g−1) at a current density of 0.5 A g−1. The cycle life of the composite was also excellent. After 1,000 cycles, it maintained 86.3% of its initial capacitance. POLYM. COMPOS., 36:113–120, 2015.