▎ 摘　　要

NOVELTY - Composite electrode is a composite nano material of bismuth(III) sulfide-molybdenum disulfide/graphene. The composition of the composite electrode comprises 80 wt.% bismuth(III) sulfide-molybdenum disulfide/graphene graphene composite nanomaterials, 10 wt.% acetylene black, 5 wt.% carboxymethyl cellulose and 5 wt.% polyvinylidene fluoride. USE - Composite electrode for simultaneous electrochemical storage of lithium and sodium storage. ADVANTAGE - The composite electrode has high reversible specific capacity of electrochemical lithium storage and sodium storage, stable cycle performance and significantly enhances high rate charge and discharge characteristics. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing composite electrode, which involves: (A) adding bismuth(III) nitrate pentahydrate, sodium molybdate(VI) dihydrate and L-cysteine to deionized water; (B) stirring well to obtain a homogeneous mixed solution, where ratio of the amount of the substance to sulfide-sodium molybdenum oxide is 1:4, and the amount of the substance of L-cysteine is 5 times the sum of the amounts of the substance of bismuth nitrate and sodium molybdenum oxide; (C) carrying out ultrasonic dispersion of graphene oxide in deionized water to obtain a uniform suspension; (D) adding suspension of graphene oxide is added to the mixed solution under continuous stirring,; (E) stirring is continued for 2 hours, and the amount of carbon is calculated; (F) transferring obtained reaction mixture to a hydrothermal reaction vessel with a polytetrafluoroethylene liner; (G) reacting at 200 degrees C for 24 h; (H) naturally cooling to room temperature; (I) centrifuging precipitated product obtained by hydrothermal reaction; (J) washing thoroughly with deionized water and absolute ethanol; and (K) drying under vacuum at 80 degrees C for 12 h, where the molar ratio of bismuth to molybdenum is 1:4; (L) using bismuth(III) sulfide-molybdenum disulfide graphene composite nanomaterial prepared as an active material for simultaneous electrochemical lithium storage and sodium storage; (M) mixing N-methylpyrrolidone of acetylene black, carboxymethyl cellulose and polyvinylidene fluoride; (N) adjusting to a uniform slurry; (O) applying obtained slurry to a copper foil as a current collector; (P) drying under vacuum at 100-120 degrees C for 12 h; and (Q) subjecting to simultaneous electrochemical storage of lithium and sodium storage by rolling, where the mass ratio of bismuth(III) sulfide-molybdenum disulfide, acetylene black, carboxymethyl cellulose and polyvinylidene fluoride is 80: 10: 5:5.