▎ 摘　　要

NOVELTY - Preparing graphene fibers by joule thermal flash evaporation involves providing conductive carbon fiber, applying voltage to carbon-containing fiber to generate joule heat to graphitize the carbon-containing fiber to obtain graphene fiber. USE - Method for preparing graphene fibers by joule thermal flash evaporation. ADVANTAGE - The method enables to prepare graphene fibers by joule thermal flash evaporation that has dense cross-section, high degree of graphitization, excellent electrical and thermal conductivity, important application value, realizes the rapid and continuous preparation of graphene fibers, and greatly reduces the production cost of graphene fibers.