TiO2(B)–CNT–graphene ternary composite anode material for lithium ion batteries

Abstract

A TiO₂(B)–CNT–graphene ternary composite material was prepared by in situ growth of TiO₂(B) on a conductive network composed of both graphene and CNTs. TiO₂(B) has nanorod morphology and is dispersed uniformly in the carbon matrices. Graphene in this composite acts as sheet-like mini-current collectors that loads TiO₂(B), whereas CNTs further enhance the electrical conductivity of TiO₂(B) by intimate contact between the two components in local regions, and also prevent the restacking between graphene layers. The composite anode material exhibits a capacity of 190 mA h g⁻¹ even after 200 cycles at 1 C, presenting excellent rate performance.