▎ 摘　　要

NOVELTY - Preparation of flexible electrode includes preprocessing graphene oxide solution; adhering mask pattern design into flexible material substrate, spraying graphene oxide solution, and drying through infrared lamp; subjecting to chemical reduction reaction in the presence of reducing agent, adding saturated sodium bicarbonate, washing with distilled water and methanol, and drying to room temperature; and performing electrochemical reduction with sodium phosphate buffer, and pressurizing through linear scanning voltammetry. USE - Method for preparation of flexible electrode (claimed) used for battery, touch screen, organic LED (OLED), supercapacitor material, and environment-friendly vehicles. ADVANTAGE - The method excellently removes graphite oxide (alkylene) functional group, increases conductivity reduction of graphene oxide, and reduces presence of oxygen-containing functional groups. DETAILED DESCRIPTION - Preparation of flexible electrode comprises: (A) mixing graphite, sodium nitrate and sulfuric acid in an ice bath, adding potassium permanganate, mixing in water bath to obtain film, adding water while continuously stirring, and adding hydrogen peroxide until solution color turns from dark brown to yellow; and filtering, adding wash water, re-dispersing residue in water while mechanically agitating, centrifuging to remove non-uniform sized graphene oxide sheets, centrifuging supernatant to remove smaller size graphene oxide debris and hydrolysis byproduct, and re-suspending precipitate in water while mechanically agitating to obtain graphene oxide solution; (B) adhering mask pattern design into flexible material substrate, spraying graphene oxide solution, and drying through infrared lamp; (C) subjecting to chemical reduction reaction in the presence of reducing agent, adding saturated sodium bicarbonate, washing with distilled water and methanol, and drying to room temperature; and (D) performing electrochemical reduction with sodium phosphate buffer, and pressurizing through linear scanning voltammetry.