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

2016; Nature Portfolio; Volume: 6; Issue: 1 Linguagem: Inglês

10.1038/srep20826

2045-2322

Chang Wang, Dong Fang, Hong‐En Wang, Yunhe Cao, Weilin Xu, Xiaoqing Liu, Zhiping Luo, Guangzhong Li, Ming Jiang, Chuanxi Xiong,

Supercapacitor Materials and Fabrication

Abstract 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.