Uniform Nickel Vanadate (Ni(3)V(2)O(8)) Nanowire Arrays Organized by Ultrathin Nanosheets with Enhanced Lithium Storage Properties

Development of three-dimensional nano-architectures on current collectors has emerged as an effective strategy for enhancing rate capability and cycling stability of the electrodes. Herein, a novel type of Ni(3)V(2)O(8) nanowires, organized by ultrathin hierarchical nanosheets (less than 5 nm) on Ti foil, has been obtained by a two-step hydrothermal synthesis method. Studies on structural and thermal properties of the as-prepared Ni(3)V(2)O(8) nanowire arrays are carried out and their morphology has changed obviously in the following heat treatment at 300 and 500 °C. As an electrode material for lithium ion batteries, the unique configuration of Ni(3)V(2)O(8) nanowires presents enhanced capacitance, satisfying rate capability and good cycling stability. The reversible capacity of the as-prepared Ni(3)V(2)O(8) nanowire arrays reaches 969.72 mAh·g(−1) with a coulombic efficiency over 99% at 500 mA·g(−1) after 500 cycles.