Porous Li4Ti5O12 anode material synthesized by one-step solid state method for electrochemical properties enhancement

A porous Li4Ti5O12 anode material was successfully synthesized from mixture of LiCl and TiCl4 with 70 wt% oxalic acid by a modified one-step solid state method. The anode material Li4Ti5O12 exhibited a cubic spinet structure and only one voltage plateau occurred around 1.5 V. The initial capacity of porous Li4Ti5O12 was 167 and 133 mAhg(-1) at 0.5 and 1C charge/discharge rate, respectively, and the capacity retention maintained above 98% after 200 cycles. The porous Li4Ti5O12 structure showed promising rate performance with a capacity of 70 mAh g(-1) at charge/discharge 10C rate after 200 cycles. It was demonstrated that the porous structure could withstand 50C charge/discharge rate and exhibited excellent cycling stability. (C) 2010 Elsevier B.V. All rights reserved.