▎ 摘　　要

NOVELTY - A composite nanomaterial electrochemical lithium storage electrode comprises 80 %mass molybdenum disulfide/boron-doped graphene composite nanomaterial as active material, 10 %mass acetylene black and 10 %mass polyvinylidene fluoride. The composite nanomaterial is prepared by uniformly loading molybdenum disulfide layer on boron-doped graphene. The doping amount of boron element in boron-doped graphene is 3.2-6.6 mol%. The molybdenum disulfide/boron-doped graphene composite nanomaterial has large electrochemically active specific surface area compared to molybdenum disulfide/undoped graphene composite nanomaterial. The molybdenum disulfide layer supported on boron-doped graphene has more defects and/or edges. USE - Composite nanomaterial electrochemical lithium storage electrode. ADVANTAGE - The electrode has high electrochemical lithium storage reversible specific capacity, stable cycle performance and high rate charge-discharge performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the composite nanomaterial electrochemical lithium storage electrode, which involves ultrasonically dispersing graphene oxide in deionized water to obtain uniform suspension, dripping metered boric acid solution to suspension under stirring, stirring for 12 hours, adding mixed solution containing sodium molybdate and L-cysteine to mixed suspension under stirring, transferring reaction mixture to PTFE-lined hydrothermal reactor, adjusting the volume of reaction mixture with deionized water to 80% of the nominal volume of inner container of hydrothermal reactor, controlling concentration of boric acid in reaction mixture to 0.0125-0.0625 mol/L, preferably 0.025 mol/L, sealing hydrothermal reactor, reacting at 180 degrees C for 24 hours, cooling to room temperature, centrifuging precipitated product, washing with deionized water and absolute ethanol, freeze-drying for 48 hours to obtain molybdenum disulfide/boron-doped graphene composite nanomaterial as active material, mixing with acetylene black and polyvinylidene fluoride, stirring with N-methylpyrrolidone solution, grinding to form uniform slurry, evenly coating slurry on copper foil as current collector, vacuum drying at 120 degrees C for 12 hours and rolling.