Mechanochemical Synthesis and Electrochemical Performances of Li4Ti5O12 Anode Materials for Lithium Ion Batteries

Abstract

Li4Ti5O12anode materials have been synthesized via mechnochemical method and subsequent sintering with nanosized TiO2and Li2CO3as reagents. XRD measurements indicated that well crystallized Li4Ti5O12could be obtained above 800 °C. The sizes of Li4Ti5O12particles increased with sintered temperature augmenting. Various particle distribution and particle sizes are presented in SEM images. In electrochemical investigations, Li4Ti5O12sintered at 800 °C presented excellent discharge-charge performances and rate capability. The discharge capacity could achieve 168 mAh/g and 140 mAh/g at 0.1 C and 1.0 C rate, respectively, which was attributed to its uniform particle size distribution and relatively small particle size.