▎ 摘　　要

NOVELTY - A composite material comprises graphene oxide and conductive poly-3,4-ethylenedioxythiophene, and does not contain polystyrene sulfonate. The conductive polymer is dispersed between the layers of the graphene oxide sheet and form a hydrogen bond with the oxygen-containing group of the graphene oxide. USE - Composite material for forming flexible conductive film for supercapacitor (all claimed). ADVANTAGE - The composite material produces conductive film having high conductivity, thermal stability and chemical stability. The self-supporting supercapacitor has excellent flexibility, larger voltage window and excellent energy performance. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) preparation of the composite material, which involves using 3,4-dioxothiophene or its derivative, redox initiator chosen from one or more of ammonium persulfate, sodium persulfate, potassium persulfate and t-butyl peroxide, graphene oxide, and dimethyl sulfoxide; (2) flexible conductive composite film; and (3) supercapacitor.