▎ 摘　　要

NOVELTY - Preparing flexible graphene silicon-oxygen-carbon composite electrode film comprises (a) placing siloxene and sodium alginate in an agate mortar, grinding until the color is uniform, placing the powder in a corundum dry pot, heating to 200°C, introducing nitrogen into the tube furnace, cooling to 40°C to obtain silicon dioxide carbon powder, (b) dispersing graphite oxide, silicon-oxycarbon powder and sodium alginate in ultrapure water to obtain uniform dispersion slurry, vacuum filtering to obtain graphene oxide silicon carbon precursor film, placing the precursor film in calcium chloride solution for 8 hours, washing with ultrapure water and absolute ethanol, and drying, (c) adding ethylenediamine to the polytetrafluoroethylene lining, placing the dried graphite oxide silicon carbon precursor film on the top of the built-in polytetrafluoroethylene column and reacting at 90°C to form a graphene silicon-oxygen-carbon composite film, cleaning the composite film, and drying. USE - Preparation method of flexible graphene silicon oxygen carbon composite electrode film. ADVANTAGE - The method enables to prepare flexible graphene silicon-oxygen carbon composite electrode film, which mitigates the capacitance degradation caused by self-stacking between the sheet layers in graphene, has high structural strength, rich pore structure and high electrochemical activity, and can lighten 1.5 V light emitting diode, and has maximum power density of 6000 W/kg, the corresponding energy density is 13.15 watt hours per kilogram.