▎ 摘　　要

NOVELTY - Synthesis of three-dimensional graphene structure involves preparing reduced graphene oxide colloidal solution by dispersing reduced graphene oxide in a solvent, spraying the colloidal solution on surface of a heated substrate in form of micro-independent droplets using a spray nozzle, and self-assembling reduced graphene oxide particles along micro-droplet interface at superheated evaporation state. The solvent is distilled water mono-solvent, or two-component solvent which is mixture of distilled water and volatile organic solvent. USE - Synthesis of three-dimensional graphene structure used as electrode material for supercapacitor, energy storage device, heat transfer device, desalination device, fuel cell, redox flow battery and capacitive deionization device (all claimed). Can also be used for field-effect transistor, optoelectronic device and chemical sensor. ADVANTAGE - The method enables simple and efficient synthesis of three-dimensional graphene structure having excellent electroconductivity and thermal conductivity, and high specific surface area. DETAILED DESCRIPTION - Synthesis of three-dimensional graphene structure involves preparing reduced graphene oxide colloidal solution by dispersing reduced graphene oxide in a solvent, spraying the colloidal solution on surface of a heated substrate in form of micro-independent droplets using a spray nozzle, and self-assembling reduced graphene oxide particles along micro-droplet interface at superheated evaporation state. The solvent is distilled water mono-solvent, or two-component solvent which is mixture of distilled water and volatile organic solvent. The concentration of the reduced graphene oxide colloid solution is 0.1-1 mg/mL. The substrate is heated and maintained at 220-350 degrees C. The spraying is repeated once or several times periodically. The temperature of the substrate is regulated by proportional integral derivative controller, and is returned to set temperature when the temperature is lowered due to spraying and evaporation of the liquid droplet. The self-assembled reduced graphene oxide particles form foam-like three-dimensional structure with micro-pores.