Figure 3
From: Ultrahigh capacitive performance from both Co(OH)2/graphene electrode and K3Fe(CN)6 electrolyte

Cycling performance of Co(OH)2/GNS electrode in 1 M KOH and Co(OH)2/GNS electrode in mixed 1 M KOH and 0.04 M K3Fe(CN)6 solution for 2000 cycles (a) and Co(OH)2/GNS electrode in mixed 1 M KOH and 0.04 M K3Fe(CN)6 solution for 20000 cycles (b), measured by using the galvanostatic charge-discharge technique at a current density of 80 Ag−1.