Wang Chang, Fang Dong, Wang Hong'en, Cao Yunhe, Xu Weilin, Liu Xiaoqing, Luo Zhiping, Li Guangzhong, Jiang Ming, Xiong Chuanxi
Key Lab of Green Processing and Functional Textils of New Textile Materials, Ministry of Education, College of Material Science and Engineering, Wuhan Textile University, Wuhan 430070, China.
School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China.
Sci Rep. 2016 Feb 10;6:20826. doi: 10.1038/srep20826.
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 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.
在集流体上开发三维纳米结构已成为提高电极倍率性能和循环稳定性的有效策略。在此，通过两步水热合成法获得了一种新型的Ni3V2O8纳米线，其由钛箔上的超薄分级纳米片（小于5nm）组成。对制备的Ni3V2O8纳米线阵列的结构和热性能进行了研究，并且在300和500°C的后续热处理中其形态发生了明显变化。作为锂离子电池的电极材料，Ni3V2O8纳米线的独特结构具有增强的电容、令人满意的倍率性能和良好的循环稳定性。制备的Ni3V2O8纳米线阵列在500 mA·g(-1)下经过500次循环后，可逆容量达到969.72 mAh·g(-1)，库仑效率超过99%。
