Figure 2 | Scientific Reports

Figure 2

From: Ultrahigh-rate supercapacitors based on eletrochemically reduced graphene oxide for ac line-filtering

Figure 2

AC Impedance characterizations of ErGO-DLC.

(a) Plot of impedance phase angle versus frequency. (b) Complex plane plot of the impedance; inset: an expanded view in the region of high frequencies. (c) Plot of specific capacitance versus frequency using a series-RC circuit model. (d) Plot of the real or imaginary part (C′ or C″) of specific capacitance versus frequency.

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