▎ 摘　　要

NOVELTY - Preparation of composite flexible thermoelectric film involves adding ground graphene oxide to deionized water, ultrasonically dispersing to obtain graphene oxide dispersion, adding ascorbic acid, cetyltrimethylammonium bromide, graphene oxide dispersion and sodium telluride to deionized water, stirring, heating in oil bath, cooling to obtain reduced graphene oxide/tellurium nanowire solution, dissolving copper sulfate and ascorbic acid in deionized water, adding to reduced graphene oxide/tellurium nanowire solution, reacting to obtain reduced graphene oxide/copper-tellurium nanowire solution, alternately centrifuging and washing with deionized water and anhydrous ethanol, dispersing the product in anhydrous ethanol to obtain reduced graphene oxide/copper-tellurium nanowire dispersion, taking reduced graphene oxide/copper-tellurium nanowire dispersion and forming a film, cold pressing and vacuum drying to form reduced graphene oxide/copper-tellurium nanowire composite film. USE - Preparation of composite flexible thermoelectric film for wearable thermoelectric application. ADVANTAGE - The preparation method is simple and provides composite thermoelectric thin film with excellent flexibility. DETAILED DESCRIPTION - Preparation of composite flexible thermoelectric film involves adding ground graphene oxide to deionized water, ultrasonically dispersing to obtain graphene oxide dispersion, adding ascorbic acid, cetyltrimethylammonium bromide, graphene oxide dispersion and sodium telluride to deionized water, stirring, heating in oil bath, naturally cooling to room temperature to obtain reduced graphene oxide/tellurium nanowire solution, dissolving copper sulfate and ascorbic acid in deionized water to obtain mixture, adding mixture to reduced graphene oxide/tellurium nanowire solution, reacting to obtain reduced graphene oxide/copper-tellurium (Cu1.75Te) nanowire solution, alternately centrifuging and washing with deionized water and anhydrous ethanol for 6 times, dispersing the product in anhydrous ethanol to obtain reduced graphene oxide/copper-tellurium nanowire dispersion, taking reduced graphene oxide/copper-tellurium nanowire dispersion and forming a film by vacuum filtration, cold pressing and vacuum drying to form reduced graphene oxide/copper-tellurium (RGO/Cu1.75Te) nanowire composite flexible thermoelectric film.