Preparation of TiO 2 (B) Nanosheets by a Hydrothermal Process and Their Application as an Anode for Lithium-Ion Batteries

TiO2 nanosheets with single monoclinic phase have been synthesized by a hydrothermal method using 6 M NaOH aqueous solution at 180°C. TiO2 nanosheets exhibited surface area of 100 m2 g−1, which is larger than those obtained by solid-state reaction. The capability of lithium-ion batteries could be strongly enhanced by TiO2(B) nanosheets to yield discharge capacity higher than 200 mAh g−1, even upon 25 cycles of 0.1-C-rate discharge–charge operations, showing highly reversible capacity and good cycling stability with excellent capacity retention of 96% with water-based binder. The results suggest that TiO2(B) nanosheets could be a promising negative electrode material for use in lithium-ion batteries.