▎ 摘　　要

NOVELTY - Production of graphene sheet involves forming a carbonaceous powder by electrochemical erosion of a graphite electrode (70) in a molten salt (110) comprising hydrogen ions, recovering the resulting carbonaceous powder from the molten salt liquid, and thermally-treating the carbonaceous powder by heating in a non-oxidizing atmosphere. USE - Production of graphene sheet. Uses include but are not limited to electron-field emitter, electrochemical capacitor, capacitive deionization electrode material, anode material for lithium-ion battery, catalyst support, biosensor, fuel cell electrode, photocatalytic application, transparent conducting film, and templates for fabrication of nanostructured materials. ADVANTAGE - The method enables production of graphene sheets with high performance characteristics and high crystallinity degree. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of an apparatus for electrochemical erosion of a graphite electrode to produce a carbonaceous powder. Apparatus (10) Resistance furnace (30) Thermocouple (40) Graphite electrode (70) Molten salt (110)