Nanosized TiO2 Rutile with High Capacity and Excellent Rate Capability

TiO2 rutile has attracted great interest since the successful intercalation at room temperature was reported using nanosized materials. Typically, the potential window of the rutile system is 1-3 V but the use of enlarged potential windows 0.5-3 V and 0.1-3 V leads to an excellent reversible capacity of similar to 315 mAh g(-1). This is comparable to graphite anodes but, in addition, the TiO2 rutile anode has a high rate capacity of similar to 196 mAh g(-1) at 5C. The capacity retention after 1000 cycles is excellent, demonstrating the good cycling stability. (C) 2010 The Electrochemical Society. [DOI: 10.1149/1.3422472] All rights reserved.