Abstract
A porous Li 4 Ti 5 O 12 anode material was successfully synthesized from mixture of LiCl and TiCl 4 with 70 wt% oxalic acid by a modified one-step solid state method. The anode material Li 4 Ti 5 O 12 exhibited a cubic spinel structure and only one voltage plateau occurred around 1.5 V. The initial capacity of porous Li 4 Ti 5 O 12 was 167 and 133 mAh g -1 at 0.5 and 1C charge/discharge rate, respectively, and the capacity retention maintained above 98% after 200 cycles. The porous Li 4 Ti 5 O 12 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. © 2010 Elsevier B.V. All rights reserved.