MnO2 nanotube and nanowire arrays by electrochemical deposition for supercapacitors

被引:258
作者
Xia, Hui [1 ]
Feng, Jinkui [1 ]
Wang, Hailong [1 ]
Lai, Man On [1 ]
Lu, Li [1 ]
机构
[1] Natl Univ Singapore, Dept Mech Engn, Singapore 117576, Singapore
关键词
Supercapacitor; Manganese dioxide; Nanotube array; Nanowire array; Cyclic voltammetry; ENERGY-STORAGE; ELECTRODEPOSITION; GROWTH; FILMS;
D O I
10.1016/j.jpowsour.2010.01.075
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Highly ordered MnO2 nanotube and nanowire arrays are successfully synthesized via a electrochemical deposition technique using porous alumina templates. The morphologies and microstructures of the MnO2 nanotube and nanowire arrays are investigated by field emission scanning electron microscopy and transmission electron microscopy. Electrochemical characterization demonstrates that the MnO2 nanotube array electrode has superior capacitive behaviour to that of the MnO2 nanowire array electrode. In addition to high specific capacitance, the MnO2 nanotube array electrode also exhibits good rate capability and good cycling stability, which makes it promising candidate for supercapacitors. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码:4410 / 4413
页数:4
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