Fig. 4. Electrochemical property of the GQDs/Gr and AL-based supercapacitor, (a) CV curve at a scan rate of 50 mV s−1 (b) galvanostatic charge/discharge curves at a current density 0.1 A g−1. (c) Rate capacity under different current density (d) Nyquist plots and (e) Bode plots phase angle versus frequency (f) cycle stability at a current density of 10 A g−1.
