COFs have an advanced energy sector . A triazine COF was synthesized via in-situ and ex-situ procedures in the presence of graphene oxide (GO, Figure ) . The composite was used to synthesize N-doped carbon (N-doped C)/reduced GO (rGO) after carbonization. N-doped C/rGO displayed a specific capacitance of 234 F/g at the current density of 0.8 A/g. The electrochemical performance of two symmetric supercapacitor devices displayed specific energy and specific power of 14.6 W•h•kg -1 and 400 W•kg -1 , respectively (Figure ) . A one-pot synthesis of COFs/graphitic carbon nitride (g-C3N4)