▎ 摘　　要

NOVELTY - The method involves heating the silicon carbide nanoparticles for a predetermined time in an ammonia atmosphere. The silicon carbide nanoparticles are cooled to obtain nitrogen-doped graphene coated silicon carbide nanoparticles. A certain mass of silicon carbide nanoparticles are weighed and placed in a container. The container containing a certain mass of silicon carbide nanoparticles is placed in a heating system. The air is evacuated in the heating system, and ammonia gas is passed into the heating system until the heating system reaches normal pressure. The heating system is heated when continuously feeding ammonia gas into the heating system. The power supply is turned off, ammonia gas passing is stopped, and waited until the heating system is naturally cooled to room temperature in the ammonia gas. The diameter of the nitrogen-doped graphene coated silicon carbide nanoparticles is 100-300 nm. USE - Preparation method for nitrogen-doped graphene coated silicon carbide nano-particle lithium ion battery anode material. ADVANTAGE - The method provides a nitrogen-doped graphene coated silicon carbide nano-particle lithium ion battery negative electrode material, which has simple preparation steps. The nitrogen-doped graphene-coated silicon carbide nanoparticle has good electrolyte wettability and enhances the charging and discharging process as a lithium-ion battery negative electrode material. The rapid transmission of electrons and lithium ions makes the rate characteristics of nitrogen-doped graphene-coated silicon carbide nanoparticle electrodes better than the reported silicon carbide electrode materials. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of the preparation of nitrogen-doped graphene coated silicon carbide nanoparticles. (Drawing includes non-English language text)