▎ 摘　　要

NOVELTY - A heteroatom-doped porous graphene modified carbon fiber paper comprises a three-dimensional network structure formed by intertwining hollow carbon tubes with a diameter of 1-10 mu m as a scaffold, where the surface of the structure is loaded with heteroatom-doped porous graphene. USE - Heteroatom-doped porous graphene modified carbon fiber paper for use as a separator material for lithium-sulfur batteries. ADVANTAGE - The carbon fiber paper suppresses the shuttle effect of polysulfides by the effects of physical restraint and chemisorption, promotes the conversion of polysulfides to lithium sulfide and improves the reaction kinetics and electrochemical performance of lithium-sulfur batteries. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for preparing a heteroatom-doped porous graphene modified carbon fiber paper, which involves dissolving the heteroatom-containing organic matter in the solvent, adding the dissolved matter dropwise to the porous graphite oxide, where the mass ratio of the heteroatom-containing organic matter to the porous graphite oxide is 1-5, heating the water bath to react for a certain time to form a stable dispersion, ultrasonically cleaning the natural cellulose, drying with deionized water and ethanol, immersing in the prepared dispersion, soaking for 3-48 hours, taking out to dry, repeating the soaking and drying steps for 2-3 times, calcining the obtained product in an inert atmosphere for 0.5-2 hours at 500-1000 degrees C, where the heating and cooling rates are 1-10 degrees C/minute to prepare the heteroatom-doped porous graphene modified carbon fiber paper.