Journal
MATERIALS RESEARCH BULLETIN
Volume 48, Issue 9, Pages 3389-3393Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2013.05.015
Keywords
Composite; Nanostructures; Oxides; Electrochemical properties
Categories
Funding
- National Natural Science Foundation of China [21106049, 21133010]
- Fundamental Research Funds for the Central Universities [2012ZM0033]
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Carbon-coated carbon nanotubes (C@CNT) was designed, synthesized and used as conductive substrate for loading manganese dioxide to prepare MnO2/C@CNT composite. C@CNT with self-sacrificial carbon layer as protection is suitable for loading higher content of MnO2. The morphology and microstructure of the as-prepared MnO2/C@CNT composite with MnO2 loading up to 78 wt% were investigated by SEM and TEM. The electrochemical performance of MnO2/C@CNT was evaluated by cyclic voltammetry (CV) and galvanostatic charge discharge (GCD) method. With the protective carbon layer on the surface of CNTs, MnO2/C@CNT composite presents superior specific capacitance of 227 F/g with MnO2 loading up to 78 wt% at a current density of 0.2 A/g and good cyclic stability with 94% of its maximal specific capacitance maintained after 1000 CV scans. (C) 2013 Elsevier Ltd. All rights reserved.
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