Preparation of TiO_2(B) Nanosheets by a Hydrothermal Process and Their Application as an Anode for Lithium-Ion Batteries

摘要

TiO_2 nanosheets with single monoclinic phase have been synthesized by a hydrothermal method using 6 M NaOH aqueous solution at 180℃. TiO_2 nanosheets exhibited surface area of 100 m~2 g~(-1), which is larger than those obtained by solid-state reaction. The capability of lithium-ion batteries could be strongly enhanced by TiO_2(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 TiO_2(B) nanosheets could be a promising negative electrode material for use in lithium-ion batteries.