▎ 摘　　要

NOVELTY - Multicomponent three-dimensional (3D) conductive carbon network comprises zero-dimensional (0D) carbon nanoparticles, one-dimensional (1D) carbon nanotubes and two-dimensional (2D) graphene nanosheets, where the 1D carbon nanotubes and the 2D graphene nanosheets are crosslinked with each other through the 0D carbon nanoparticles. USE - The carbon network is used in the composite electrode for preparing lithium ion battery (all claimed). ADVANTAGE - The carbon network improves the electrochemical performance of electrode materials, when applied to lithium-ion batteries, has high capacity, and excellent stability and rate performance. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) a self-supporting composite electrode, comprising an electrode active material and the carbon network, and an electrode active material is uniformly distributed in the carbon network; and (2) a method for preparing the composite electrode, involving polymerizing a uniformly mixed reaction system containing niobic acid, conductive polymer precursor, carbon nanotube and graphene oxide to generate niobic acid/conductive polymer/graphene oxide/carbon nanotube composite, and calcining the composite to form a niobium oxide/carbon nanoparticle/graphene/carbon nanotube composite, so as to obtain the product.