Journal
ELECTROCHIMICA ACTA
Volume 113, Issue -, Pages 373-381Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2013.09.125
Keywords
Carbon nanotubes; Manganese dioxide; Nanocomposites; Supercapacitor
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Funding
- Doctoral Research Foundation of Guangzhou Medical College [L110505]
- research fund of the Key Laboratory of Fuel Cell Technology of Guangdong Province
- State Key Laboratory of Electroanalytical Chemistry, Chang Chun Institute of Applied Chemistry, Chinese Academy of Sciences
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Three-dimensional hierarchical porous electrode with nanocomposites of MnO2 thin layer encapsulated carbon nanotubes (CNTs) was achieved. Scanning electron microscopy images displayed that the whole surface of CNTs was completely coated with uniform MnO2 thin layer leading to a novel encapsulated structure with CNTs core and MnO2 shell. The as-prepared electrode presented a superb charge storage characteristic with large specific capacitance of 564.40 mF cm(-2), which was two orders of magnitude higher than that of bare CNTs electrode (0.99 mF cm(-2)). Besides, the nanocomposites electrode also displayed a long circle life with only 3% capacitance decay after 1000 charge-discharge cycles indicating a promising electrode for supercapacitors. (C) 2013 Elsevier Ltd. All rights reserved.
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