▎ 摘　　要

NOVELTY - Few-layer graphene modified lithium-rich manganese-rich anode material and preparation method, is new. USE - Preparation of few-layer graphene modified lithium-rich manganese base anode material for lithium ion battery. ADVANTAGE - The process flow is simple, the raw material cost is low, the condition is easy to control and operate, easy to scale production, the prepared modified lithium-rich manganese base material not only has excellent multiplying power performance, but also has high specific capacity and stable cycle performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a preparation method of a few-layer graphene modified lithium-rich manganese-based anode material, involving: a. dropping the metal salt solution and the precipitating agent and the complexing agent into the reaction container in the non-reducing atmosphere at the same time at 30-70 degrees centigrade, where pH is 7-10, under the condition of constant temperature; b. stirring after the reaction is completely precipitated at 30-70 degrees centigrade and continuously aging for 4-24h the obtained precipitate by de-ionized water, filtering and washing for multiple times, drying at 105 degrees centigrade to obtain the precursor; c. taking the expandable graphite in the microwave oven to expand the power is 10kw, the expansion time is 10-60 s to obtain the expanded graphite A; d. dissolving the precursor and the expanded graphite A in the functional organic solvent, dripping a certain amount of organic coupling agent, stirring and pre-dispersing, forming mixed solvent B, where 10 to 300mL of functional organic solvent is added with 0.1g of expanded graphite A, the mass ratio of the expanded graphite A to the precursor material is 0.1 to 5 %, the mass ratio of the organic coupling agent to the expanded graphite A is 1-50 wt.%; e. peeling the mixed solvent B ultrasonically for 10-20 min, adding mechanical stirring, stirring speed is 100-1000r/min, forming a few layers of graphene modified precursor, suspension stirring at normal temperature for 0.5h to 2h, after washing for multiple times; f. drying to obtain the modified precursor, uniformly mixing the modified precursor with a certain amount of lithium-containing component, heating to 300-600 degrees centigrade in inert atmosphere or air atmosphere at a speed of 1-10 degrees centigrade/min for calcining for 1-5h, then heating to 700-1200 degrees centigrade at the speed of 1-10 degrees centigrade/min, calcining for 5-24 h at constant temperature; g. cooling to obtain the lithium-rich manganese-base anode material. DESCRIPTION OF DRAWING(S) - The drawing shows the first charge and discharge curve diagram of the modified lithium-rich manganese-rich anode material prepared in Example 1. Expanded graphite (3)