Fig. 3.

PAni hydrogel as high-performance 3D nanostructured electrodes for supercapacitors. (A) Impedance curve of a PAni hydrogel-based supercapacitor electrode. (B) Cyclic voltammogram curves of the PAni hydrogel electrode at different scan rates (10–200 mV·s^-1). (C) Galvanostatic discharge profiles at various current densities (0.5–5 A·g^-1). (D) Summary plot of specific capacitance values vs. current density for PAni hydrogel-based electrodes. (Inset) Cycling test showing ∼83% capacitance retention over 10,000 cycles at high current rate of 5 A·g^-1.