▎ 摘　　要

NOVELTY - Preparing a silicon oxide-based lithium battery negative electrode material involves: (1) preparing silicon oxide-carbon/graphene powder; and (2) dispersing the silicon oxide-carbon/graphene powder in alcohol, then adding a certain amount of lithium nitrate, stirring for a period of time until the lithium nitrate is completely dissolved, transferring the mixture to a rotary evaporation dryer, performing rotary drying for a period of time, placing the obtained powder in a crucible, using a reducing atmosphere as a reaction atmosphere to carry out reaction at a certain temperature for a certain period of time, and cooling the furnace to room temperature. USE - The method is useful for preparing a silicon oxide-based lithium battery negative electrode material. ADVANTAGE - The method prepares the silicon oxide-based lithium battery negative electrode material with high-rate characteristics and cycle stability. The prepared electrode material has retention rate increased by 10% compared to the specific capacity of the current density of 0.1 A/g, and excellent specific capacity under the condition of a current density of 2 A/g. DETAILED DESCRIPTION - Preparing a silicon oxide-based lithium battery negative electrode material involves: (1) preparing silicon oxide-carbon/graphene powder by (1.1) dissolving a certain amount of silicon ester in ethanol, then adding ionic water and hydrochloric acid, and stirring evenly to obtain a mixed solution (A), (1.2) taking a certain amount of sucrose and graphene oxide dispersion, and stirring until the mixture is dissolved to obtain a mixed solution (B), (1.3) adding aqueous ammonia to the mixed solution (A) to adjust the pH value to obtain a silica gel, and continuously adding the mixed solution (B) to the silica gel after the reaction is completed to obtain a silicon-oxygen-sucrose-graphene oxide brown gel, (1.4) ball-milling the silicon-oxygen-sucrose-graphene oxide brown gel in a ball mill for a period of time, and then transferring to a freeze dryer for drying to obtain a precursor silicon-oxygen-sucrose-graphene oxide powder, and (1.5) placing the silicon-oxygen-sucrose-graphene oxide powder in a crucible, using an argon atmosphere as a protective atmosphere to carry out a reduction reaction, and cooling the furnace to room temperature; and (2) dispersing the silicon oxide-carbon/graphene powder in alcohol, then adding a certain amount of lithium nitrate, stirring for a period of time until the lithium nitrate is completely dissolved, transferring the mixture to a rotary evaporation dryer, performing rotary drying for a period of time, placing the obtained powder in a crucible, using a reducing atmosphere as a reaction atmosphere to carry out reaction at a certain temperature for a certain period of time, and cooling the furnace to room temperature. An INDEPENDENT CLAIM is included for the silicon oxide-based lithium battery negative electrode material prepared by the above method.