Determination of specific capacitance from cyclic voltammetry (CV) at various scan rates for electrodes of samples CFGCN-0, CFGCN-1, CFGCN-2, CFGCN-3, and CFGCN-4.

Scan rate (mV s−1)	Specific capacitance (F g−1)
	CFGCN-0	CFGCN-1	CFGCN-2	CFGCN-3	CFGCN-4
5	48.8	67.6	124.8	244.0	129.0
10	45.0	59.8	116.3	171.7	104
25	23.5	51.9	103.8	142.0	95.7
50	16.3	51.3	84.28	130.4	88.1
100	12.28	38.2	78.01	90.2	75.5