▎ 摘　　要

NOVELTY - Preparation of fluorine-nitrogen-doped graphene composite lithium titanate nanomaterial involves adding (i) a titanium source to a sodium hydroxide solution, and performing hydrothermal reaction to obtain sodium titanate nanowires, adding (ii) hydrochloric acid to the sodium titanate nanowire solution to acidify to obtain titanate nanowires, adding (iii) a solution comprising a lithium source, a fluorine source, graphene oxide and a catalyst to the titanate nanowires, and performing hydrothermal reaction to obtain fluorine-doped graphene oxide composite lithium titanate nanowires, and adding (iv) a nitrogen source to the fluorine-doped graphene oxide composite lithium titanate nanowires, performing hydrothermal reaction, adding a reducing gas, and sintering at a high temperature under a nitrogen atmosphere. USE - Preparation of fluorine-nitrogen-doped graphene composite lithium titanate nanomaterial (claimed). ADVANTAGE - The method enables preparation of fluorine-nitrogen-doped graphene composite lithium titanate nanomaterial having improved conductivity, electrochemical performance, safety, and stability. The nanomaterial has uniform graphene coating, by hydrothermally-reacting the fluorine source and graphene oxide with lithium source and titanate nanowires under the action of catalyst in the liquid phase, generating titanium-fluorine bonds, and converting tetravalent titanium into trivalent titanium. The charge transfer rate of the nanomaterial can be increased, by hydrothermally-reacting the fluorine-doped graphene nanowires with nitrogen source, and sintering at high temperature in nitrogen atmosphere to perform nitriding treatment to complete the nitrogen doping.