▎ 摘　　要

NOVELTY - A spongy silicon graphene and carbon nanotube composite cathode material involves preparing material by weighing 50-90% silicon powder, 2-30% graphene oxide and 1-20% carbon nanotubes. The material is pretreated by adding first graphene oxide and carbon stir nanotubes to the water to obtain a dispersion of graphene oxide and carbon nanotubes, adding silicon powder to the dispersion of graphene oxide and carbon nanotubes, and stirring to obtain a mixture, followed by heat treating the above mixture, transferring to a hot water kettle and drying. USE - Method for preparing spongy silicon graphene and carbon nanotube composite cathode material. ADVANTAGE - The material has high conductivity, structural flexibility, strong absorption, inhibit the effect of volume expansion of silicon in the process of charging and discharging, and improve the cycle stability and can be prepared in simple, environmental friendly and cost effective manner. DETAILED DESCRIPTION - A spongy silicon graphene and carbon nanotube composite cathode material involves preparing material by weighing 50-90% silicon powder, 2-30% graphene oxide and 1-20% carbon nanotubes. The material is pretreated by adding first graphene oxide and carbon stir nanotubes to the water to obtain a dispersion of graphene oxide and carbon nanotubes, adding silicon powder to the dispersion of graphene oxide and carbon nanotubes, and stirring to obtain a mixture, followed by heat treating the above mixture, transferring to a hot water kettle at 150-200 degrees C under hydrothermal reaction conditions for 15-24h to obtain graphene containing silicon powder - carbon nanotube composite hydrogel, freeze-drying or supercritical drying to obtain product.