Fig. 7: Variations in the capacitances for the samples.
From: Single-site pyrrolic-nitrogen-doped sp2-hybridized carbon materials and their pseudocapacitance

Variations in the pseudocapacitances with respect to pyrrolic nitrogen content in CMs (FPF), SPNCMs (F, 1/7), SPNCMs (F, 1/3), and SPNCMs (F, 1/1).