▎ 摘　　要

Graphene oxide(GO) aqueous solution was synthesized by modified Hummers method. Graphites reacted with concentrated sulfuric acid, potassium persulfate and phosphorus pentoxide to get strong oxidized products, then reacted with concentrated sulfuric acid, sodium nitrate and potassium permanganate. GO solution was obtained through the foaming of hydrogen peroxide, pickling and ultrasonic. After the reduction of metal copper and substrate transformation process, GO-indium tin oxide(ITO) composite electrode was prepared. Then, polyaniline(PANI) film was prepared on the composite electrode by electropolymerization technique and further characterized. Compared to that on ITO electrode, PANI film on GO-ITO composite electrode showed a more homogeneous and uniform nanoparticle morphology and better film-forming character, providing larger interface area between the polymer and electrolyte and more transport channel for counterions. The result showed that PANI film exhibited higher optical contrast with increasing by 13% at 700 nm, faster switching speed with reducing by 2. 6 s, high coloration efficiency of 169. 6 cm(2)/C and still remained the original good electrochemical stability. In summary, GO-ITO composite electrode can effectively improve electrochromic performance, endowing the potential applications on electrochromic materials and devices.