Carbon-coated Li4Ti5O12 particle anchored on reduced graphene oxide for Li-ion batteries

Abstract

Herein, a disordered carbon and rGO co-modified Li4Ti5O12 (LTO) anode material (LTO/C@rGO) was prepared by a simple hydrothermal reaction. In this anode material, the intermediate carbon layer acts as a bridge to anchor the LTO particles uniformly on the reduced graphene oxide (rGO) sheets to construct a special network structure. The high conductivity of rGO is used to improve the electronic and ionic conductivity of LTO, and the content of rGO is adjusted to achieve the purpose of balancing the electron and ion transport efficiency. When the introduction amount of rGO is 5 wt%, the discharge-specific capacities are 290.0 mAh/g and 249.9 mAh/g of 10 cycles at 200 mA g−1 and 2000 mA g−1, respectively. Therefore, the construction of this special structure plays an ideal role in improving the rate performance and long-cycle stability of LTO anode materials for lithium-ion batteries.