TERNARY MATERIAL COATED WITH THREE-DIMENSIONAL NETWORK STRUCTURE OF COUPLED CARBON NANOTUBE-GRAPHENE COMPOSITE AND MANUFACTURING METHOD THEREOF

摘要

The present invention relates to the technical field of battery materials, and in particular discloses a ternary material coated with a three-dimensional network structure of a coupled carbon nanotube-graphene composite and a manufacturing method thereof. The ternary material coated with the three-dimensional network structure of the coupled carbon nanotube-graphene composite is made from a nickel-cobalt-manganese ternary material, carbon nanotubes and graphene. The method comprises: using polyvinylpyrrolidone as a dispersant, and at the same time, connecting graphene and carbon nanotubes by using a silane coupling agent and via liquid-phase self-assembly to form a three-dimensional network structure thereof; and next uniformly dispersing the coupled carbon nanotube-graphene composite material and the nickel-cobalt-manganese ternary material via a physical method, then coating the surface of the nickel-cobalt-manganese ternary material, and placing in an inert atmosphere to sinter, so as to obtain a uniformly-coated product. The product of the present invention has a high specific discharge capacity, long cycle life and a simple manufacturing process facilitating mass production.