▎ 摘　　要

NOVELTY - Preparing capacitive carbon polar composite material comprises placing the activated carbon in a vacuum pot, and injecting alkane into the vacuum pot, heating the vacuum pan, splitting the alkane and growing graphene on the activated carbon surface to obtain capacitive carbon polar composite material. USE - The composite material is used for capacitor electrode. ADVANTAGE - The composite material: has high conductivity; and improves the conductivity of the capacitor electrode and the capacitance of capacitor. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: 1 preparing the capacitance electrode; 2 capacitor electrode; and 3 capacitor.