Synthesis of Li4Ti5O12 nanoclusters for lithium-ion batteries with excellent electrochemical performances

摘要

Li4Ti5O12 nanoclusters are successfully prepared by a facile solution-based method and subsequent calcination. The influences of calcination temperatures on the microstructure and electrochemical performance of the products are studied. Results indicate that the sample annealed at 700 degrees C exhibits outstanding rate performances and excellent long-term cycle stabilities. It displays a high initial Coulombic efficiency of 96.0% and a desirable discharge capacity of 176 mAh g(-1) at 0.1 degrees C between 1.0 and 2.5 V (vs. Li/Li+). The discharge capacity at 10 degrees C is as high as 116 mAh g(-1) with capacity retention of 95.7% over 100 cycles. Therefore, this Li4Ti5O12 nanocluster material can be a superior and practical candidate for the anodes of high-power lithium-ion batteries. (C) 2015 Elsevier B.V. All rights reserved.