Figure 7
Electrochemical characteristics of HPGC-750 symmetric supercapacitor: (a) CV curves at various scan rates in 6 M KOH; (b) GCD curves at various current densities in 6 M KOH; (c) CV curves tested in different potential windows at 40 mV s−1 in 1 M Na2SO4; (d) CV curves at different scan rates in a potential window of 1.8 V in 1 M Na2SO4; (e) GCD curves at different current densities in 1 M Na2SO4; (f) Ragone plots of HPGC-750//HPGC-750 supercapacitor and performances comparison with other carbon-based symmetric supercapacitors (circle: 6 M KOH electrolyte, and sphere: 1 M Na2SO4 electrolyte).
