Resolution:
## Figure 6.
CV and charge–discharge curves of the composites. (A) CV curves of the as-prepared samples in 0.1 M HClO_{4}solution at 50 mV s^{−1}, curves a to d: MnO_{2}/PANI fabricated in 1, 0.05, and 0.02 M HClO_{4}, and 0.1 M NaOH, respectively. Curve e: 500°C-treated MnO_{2}/PANI fabricated in 0.02 M HClO_{4}. (B) Charge–discharge curves of the MnO_{2}/PANI composite in 0.1 M HClO_{4} solution at different current densities. (C) First 20 cycles of charge–discharge curves for the MnO_{2}/PANI composite at the current density of 1 mA cm^{−2} (D) Dependence of capacitance of the MnO_{2}/PANI composite on the charge–discharge cycles at the current density of 1 mA cm^{−2}.
Meng |