▎ 摘 要
NOVELTY - Preparation of graphene sheet comprises forming graphitizing catalyst in a sheet form, disposing polymer on graphitizing catalyst, and heat-treating the polymer on graphitizing catalyst in inert or reductive atmosphere. USE - Preparation of graphene sheet for hydrogen storage medium, electrical device, graphene substrate (claimed), membrane, optical fiber or transparent electrode. ADVANTAGE - The method is economical, and the graphene sheet has large surface area of desired thickness, excellent conductivity, high uniformity and flexibility. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic flow diagram illustrating the preparation of graphene sheet.