Figure 3
From: Metal-free supercapacitor with aqueous electrolyte and low-cost carbon materials
(a) Data plot of measured specific capacitance on SC units from samples A to D from both galvanostatic cycling (blue, ○) and cyclic voltammetry (green, △). The red plot (+) corresponds to the theoretical specific surface area of the electrode on the basis of the material composition. (b) Bar plot of SC series resistance (ESR), the electrical resistivity in the electrode-coated graphite foil (ECGF ρ) and the electrical resistivity in the electrode film (EF ρ) for samples A to D. The value axis has a logarithmic scale. (c) Data plot from 24 h constant current cycling (0 V − 1 V − 0 V) on SC units from samples A to D.
