▎ 摘　　要

NOVELTY - An aqueous lithium-reducing additive comprises lithium-silicon-doped-lithium-doped graphene having a core-shell structure, where the core-shell structure has a nuclear-subshell-shell hierarchical structure, the active lithium source and the secondary shell of the inner core constitute a first waterproof layer and a graphene film of the outer shell constitutes a second waterproof layer, the aqueous lithium-reducing additive is prepared by thoroughly mixing and stirring fluorine-containing organic compound and deionized water, adding nano silicon powder, stirring, ultrasonically oscillating, collecting the silicon powder and vacuum drying to obtain A product, adding A product to molten pure lithium liquid under argon atmosphere, placing in a dry environment for a certain period of time to form a B product, adding B product to a reaction solvent to obtain the finished product. USE - Aqueous lithium-reducing additive for negative electrode. ADVANTAGE - The aqueous lithium-reducing additive has excellent conductivity, high gram capacity and improved first charge-discharge efficiency and discharge capacity. DETAILED DESCRIPTION - An aqueous lithium-reducing additive comprises lithium-silicon-doped-lithium-doped graphene having a core-shell structure (LixSiadoptLiy(M)) adopt graphene, where 1.0 less than or equal to x less than or equal to 4.4, 1 less than or equal to y less than or equal to 2, M is fluoride-ion or fluoride and carbonate ion, and graphene is a film of 20 or less carbon atoms, the core-shell structure has a nuclear-subshell-shell hierarchical structure, the active lithium source and the secondary shell of the inner core constitute a first waterproof layer and a graphene film of the outer shell constitutes a second waterproof layer, the aqueous lithium-reducing additive is prepared by thoroughly mixing and stirring fluorine-containing organic compound and deionized water, adding nano silicon powder, stirring, ultrasonically oscillating, collecting the silicon powder and vacuum drying to obtain A product, adding A product to molten pure lithium liquid under argon atmosphere, placing in a dry environment for a certain period of time to form a B product, adding B product to a reaction solvent mixed with ethanol and deionized water, adding graphite oxide, transferring to a microwave heating reaction device equipped with a stirring function, turning on microwave heating, adjusting power, adding reducing agent, washing, vacuum drying, collecting the precipitate to obtain the finished product.