Fig. 4.

Measurement in three-electrode system. a CV curves of hybrid composites, rGO and pure PANI at the scan rate of 20 mV s^-1 in 1 M H₂SO₄. b Galvanostatic charge–discharge curves of hybrid composites, rGO and PANI at a current density of 1 A g^-1. c CV curves of hybrid composites composite at different scan rates. d Galvanostatic charge–discharge curves of hybrid composites composite at different current densities. e Plot of specific capacitance for hybrid composites, rGO and pure PANI electrode at different current densities in 1 M H₂SO₄ aqueous electrolyte; f Nyquist plots of hybrid composites, rGO and pure PANI electrode in 1 M H₂SO₄ aqueous electrolyte. The inset figure shows the magnified high-frequency regions of the Nyquist curves