Uniform Nickel Vanadate (Ni3V2O8) Nanowire Arrays Organized by Ultrathin Nanosheets with Enhanced Lithium Storage Properties

• DOI: 10.1038/srep20826
• Publication Date: 2016-02-10T11:54:49Z
• Authors: Chang Wang; Dong Fang; Hong’en Wang; Yunhe Cao; Weilin Xu; Xiaoqing Liu; Zhiping Luo; Guangzhong Li; Ming Jiang; Chuanxi Xiong
• Keywords: 01 natural sciences; 7. Clean energy; Article; 0104 chemical sciences

AbstractDevelopment 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 Ni3V2O8 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 Ni3V2O8 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 Ni3V2O8 nanowires presents enhanced capacitance, satisfying rate capability and good cycling stability. The reversible capacity of the as-prepared Ni3V2O8 nanowire arrays reaches 969.72 mAh·g−1 with a coulombic efficiency over 99% at 500 mA·g−1 after 500 cycles.