▎ 摘　　要

NOVELTY - Composite electrode of nitrogen-doped three-dimensional bi-continuous porous carbon and graphene comprises current collectors and composite materials. The composite material is supported on surface of current collector, and contains nitrogen-doped three-dimensional bi-continuous porous carbon and graphene. The nitrogen-doped three-dimensional bi-continuous porous carbon is used to act as a spacer to avoid re-stacking of graphene, and to increase the contact area with graphene. USE - The composite electrode is useful in a supercapacitor (claimed). ADVANTAGE - The electrode: utilizes nitrogen-doped three-dimensional bi-continuous porous carbon with a thickness of 1-100 nm, a specific surface area of 1000-2300 m2/g, a total pore volume of 0.5-1.63 cm3/g, an average pore size of 2-4 nm and a nitrogen mass content of 1-11 wt.%; utilizes graphene having a conductivity of 50-5000 S/cm, a width of 0.5-50 mu and a thickness of 1-50 nm; utilizes the composite material, whose load on the current collector is 0.8-3 mg/cm2; has excellent conductivity, higher specific capacity and energy density than traditional capacitors, and good electrochemical cycle stability; and is prepared by the method, which is simple, cost effective and environmentally friendly. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the composite electrode of nitrogen-doped three-dimensional bi-continuous porous carbon and graphene comprising (a) mixing nitrogen-doped three-dimensional bi-continuous porous carbon and graphene to obtain mixed powder, (b) adding binder and solvent to the mixed powder obtained in step (a) to obtain a premixed liquid, (c) evenly apply the premix liquid obtained in step (b) to the current collector, or immerse the current collector in the premix liquid obtained in step (b), and (d) drying the current collector obtained in step (c) to obtain the composite electrode of the nitrogen-doped three-dimensional bi-continuous porous carbon and graphene. DESCRIPTION OF DRAWING(S) - The drawing shows a flowchart illustrating the method of preparing the composite electrode of nitrogen-doped three-dimensional bi-continuous porous carbon and graphene (Drawing includes non-English language text).