▎ 摘　　要

NOVELTY - A silicon oxycarbide composite negative electrode material is prepared by placing mixture of wood powder and polysiloxane in a tube furnace and sintering at a high temperature under the protection of argon gas. The temperature is raised to 800-1000 degrees C at a rate of 5 degrees C/minute. The furnace is cooled to obtain silicon oxycarbide ceramic powder. The ceramic powder and the graphene oxide are ground at a certain ratio to obtain a mixture. The mixture is subjected to a thermal reduction under an atmosphere of argon gas, and cooling the furnace. USE - Silicon oxycarbide composite negative electrode material for lithium ion battery. ADVANTAGE - The material has improved conductivity and can effectively improve irreversible capacity loss and voltage hysteresis of the silicon oxycarbide. DETAILED DESCRIPTION - A silicon oxycarbide composite negative electrode material is prepared by placing mixture of wood powder and polysiloxane in a tube furnace and sintering at a high temperature under the protection of argon gas, where the sintering temperature is 50 degrees C, and the temperature is raised to 400 degrees C at a rate of 5 degrees C/minute, and the temperature is maintained for 30 minutes. The temperature is raised to 800-1000 degrees C at a rate of 5 degrees C/minute. The furnace is cooled to obtain silicon oxycarbide ceramic powder. The ceramic powder and the graphene oxide are ground at a certain ratio to obtain a mixture. The mixture is subjected to a thermal reduction under an atmosphere of argon gas, at initial temperature of 50 degrees C, and raising temperature to a suitable temperature at a rate of 5 degrees C/minute and cooling the furnace.