▎ 摘　　要

NOVELTY - Electrochemical lithium storage composite electrode comprises 80 %mass composite nanomaterial of bismuth (III) sulfide-molybdenum disulfide/graphene as active material, 10 %mass acetylene black and 10 %mass polyvinylidene fluoride, where the composite nanomaterial is formed by forming a composite structure of molybdenum disulfide nanosheets and bismuth (III) sulfide nanoparticles, and uniformly loading on graphene. USE - As electrochemical lithium storage composite electrode. ADVANTAGE - The composite electrode has high electrochemical reversible specific capacity of lithium storage, has stable cycle performance, and has high rate charge and discharge performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing the composite electrode, involving (i) adding the weighed bismuth (III) nitrate pentahydrate, sodium molybdate dihydrate and L-cysteine to deionized water and thoroughly stirring to obtain a uniform mixed solution, where the ratio of the amount of bismuth (III) nitrate to sodium molybdate in the hydrothermal reaction solution is 1:9-1:4, and the amount of L-cysteine is 5 times the sum of the amounts of bismuth (III) nitrate and sodium molybdate, (ii) ultrasonically dispersing graphene oxide in deionized water to obtain a uniform suspension, adding the graphene oxide to the mixed solution under continuous stirring for 2 hours, calculating the amount of the substance of carbon, where the amount of the substance of graphene oxide is equal to twice the sum of the amounts of the substance of bismuth (III) nitrate and sodium molybdate, transferring the obtained reaction mixture to a hydrothermal reaction vessel with a polytetrafluoroethylene liner, sealing and reacting at 200 degrees C for 24 hours, naturally cooling to room temperature, centrifuging the precipitated product obtained by hydrothermal reaction, thoroughly washing with deionized water and absolute ethanol, vacuum-drying at 80 degrees C for 12 hours to obtain the composite nanomaterial, where the molar ratio of bismuth to molybdenum is 1:9-1:4, and (iii) using the composite nanomaterial as an electrochemical lithium storage active material, thoroughly mixing the composite nanomaterial with acetylene black and polyvinylidene fluoride N-methylpyrrolidone solution under stirring to form a uniform slurry, where the mass ratio of the composite nanomaterial, acetylene black and polyvinylidene fluoride is 80:10:10, uniformly applying the slurry onto a copper foil as a current collector, vacuum-drying at 120 degrees C for 12 hours, and rolling to obtain the composite electrode.