Fig. 6

a CV curves for an asymmetric supercapacitor with the Co3O4/SGP acting as the anode. b, c GCD curves and specific capacitances at different current densities. d Cycling performance at a current density of 1 A/g
a CV curves for an asymmetric supercapacitor with the Co3O4/SGP acting as the anode. b, c GCD curves and specific capacitances at different current densities. d Cycling performance at a current density of 1 A/g