Abstract: Lithiated titanium complex oxide Li₄Ti₅O₁₂ was prepared by solid-state method. The influence of reaction time on the structure and electrochemical performance of Li₄Ti₅O₁₂ was investigated. The samples with the reaction time of 2 h and 4 h show a good reversibility, and their specific capacity after 30 cycles is as high as 159 mAh/g when charged and discharged at 80 mA/g.