▎ 摘　　要

NOVELTY - The preparation of graphene film involves cutting graphene film in needed shape based on actual power information, placing two ends of graphene film in boiling water, electrifying directly using electrode or heating graphene film, and ejecting liquid droplets by boiling heat transfer to obtain porous graphene film of uniform surface. USE - Preparation of graphene film with enhanced critical heat flow density (claimed). ADVANTAGE - The method enables preparation of graphene film with improved critical heat flow density value, at reduced cost, without the need for complicated physical and chemical surface processing devices.