▎ 摘　　要

NOVELTY - Porous composite carbon material comprises porous thin-layer graphene and porous activated carbon. USE - The material is useful for preparing supercapacitor (claimed). ADVANTAGE - The composite material has good electric performance. The supercapacitor has low internal resistance, high power density, high energy density and long service life. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) use of the porous composite carbon material in preparing supercapacitor; and (2) the supercapacitor comprising a cathode and an anode, where the cathode or anode contains 0-100 wt.% porous composite carbon material.