Hexagonal hollow mesoporous TiO2/carbon composite as an advanced anode material for lithium-ion batteries

摘要

Exploring the fast-charge anodes is crucial to meet the needs of lithium-ion battery (LIB) markets. Here, a hollow hexagonal mesoporous TiO2/carbon composite (HHM-TiO2/C) was synthesized by a template-engaged approach. The obtained HHM-TiO2/C exhibits superior rate capability and long-life cycling stability when used as anode materials in Li-ion batteries, with a specific capacity over 200mAhg(-1) after 500cycles at a current density of 1C. Even at a high rate of 20C, the current density reaches to 4Ag(-1), a high capacity of 130mAhg(-1) still can be maintained. The excellent performance attributed to the engineered structure not only can effectively shorten the diffusion of Li+ and electron to enhance the conductivity, but also can buffer the pulverization and aggregation of electrode and thus maintain the structural integrity during the charge/discharge process.