Ammonium vanadate@polypyrrole@manganese dioxide nanowire arrays with enhanced reversible lithium storage

作者：Wang, Chang; Liu, Hui; Jiang, Ming; Wang, Yingde; Liu, Ruina; Luo, Zhiping; Liu, Xiaoqing; Xu, Weilin; Xiong, Chuanxi; Fang, Dong^*

来源：Applied Surface Science, 2017, 416: 402-410.

DOI：10.1016/j.apsusc.2017.04.069

• Ammonium vanadate
• Nanowire array
• Core@shell@shell structure
• Lithium ion battery

Design and fabrication of novel optimized electrode materials are important for the development of new batteries for energy storage applications. Herein, we report on a hierarchical bulk electrode material with a tailored nanostructure that which consists of three components: a NH(4)V4O(10) nanowire as an active skeleton, an intermediate polymer layer (polypyrrole, PPy), and a metal oxide layer (MnO2) as the outside shell. The NH4V4O10-PPy-MnO2 nanowires exhibit present higher capacitance than that of the simple NH4V4O10-PPy core@shell or NH4V4O10 nanowires. The structure of double shells of combined PPy and MnO2 is a key factor in enhancing their electrochemical performance including high specific capacitance and excellent cycling stability. Our V-based core@shell@shell structure can serve as freestanding, compressible electrodes for various energy devices.

• 出版日期2017-9-15
• 单位武汉理工大学; 武汉纺织大学; 中国人民解放军国防科学技术大学; 中南大学