CV and charge–discharge curves of the composites. (A) CV curves of the as-prepared samples in 0.1 M HClO4solution at 50 mV s−1, curves a to d: MnO2/PANI fabricated in 1, 0.05, and 0.02 M HClO4, and 0.1 M NaOH, respectively. Curve e: 500°C-treated MnO2/PANI fabricated in 0.02 M HClO4. (B) Charge–discharge curves of the MnO2/PANI composite in 0.1 M HClO4 solution at different current densities. (C) First 20 cycles of charge–discharge curves for the MnO2/PANI composite at the current density of 1 mA cm−2 (D) Dependence of capacitance of the MnO2/PANI composite on the charge–discharge cycles at the current density of 1 mA cm−2.
Meng et al. Nanoscale Research Letters 2013 8:179 doi:10.1186/1556-276X-8-179