Fig. 7From: Preparation and Specific Capacitance Properties of Sulfur, Nitrogen Co-Doped Graphene Quantum DotsCV curves of S, N-GQDs with different doping ratios at a scan rate of 50 mV/s (a). CV curves of S, N-GQDs-1 (b), S, N-GQDs-2 (c), S, N-GQDs-3 (d), and GQDs (e) at different scan rates of 5, 10, 20, 50, 100, and 200 mV/s. f Specific capacitance values of S, N-GQDs-1, S, N-GQDs-2, S, N-GQDs-3, and GQDs at different scan rates of 5, 10, 20, 50, 100, and 200 mV s−1Back to article page