C/G/CNT-S negative electrode material, preparation method and application

The invention provides a C/G/CNT-S negative electrode material, a preparation method and application, and particularly relates to the technical field of lithium ion batteries. The C/G/CNT-S negative electrode material comprises a carbon fiber, a sulfur core, a graphene box and a carbon nanotube, the graphene boxes are arranged on the surface of the carbon fiber in an array; the sulfur core is located in the graphene box; the carbon nanotubes are positioned on the surface of the graphene box and are bonded with the graphene box in a C-C bonding manner. Wherein the graphene box is used as a buffer space for volume expansion in the charge-discharge process of the sulfur negative electrode, and also provides compact outer layer protection for sulfur, so that the sulfur is effectively prevented from falling off; and the graphene box is also bonded with the carbon nanotubes to form a stable structure, so that the conductivity of the negative electrode material is improved. According to the integrated C/G/CNT-S nega