▎ 摘　　要

NOVELTY - The composite material comprises a sheet graphene and porous graphene. The porous graphene is coated on the surface of the sheet graphene. USE - Composite material used in field of lithium ion capacitor (claimed). ADVANTAGE - The porous graphene sheet has high specific capacity, excellent multiplying power performance and good cycle stability. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) preparation method of the composite material; (2) electrode comprising active material, conductive agent bonding agent and current collector; (3) preparation of the electrode; and (4) semi-battery.