Journal
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
Volume 45, Issue 6, Pages 2995-2999Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jtice.2014.08.015
Keywords
Manganese dioxide; One-dimensional nanostructures; Hydrothermal synthesis; Supercapacitors
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Funding
- National Natural Science Foundation of China [20663001, 20763002]
- Special guidance project for the development of Guangdong high tech zone [2011B010700060]
- Science and technology project of Maoming [2014006]
- [513086]
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Novel MnO2 nanosilks self-assembled micropowders have been prepared by a simple one-step hydrothermal synthesis method. The structure and morphology of the MnO2 are investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively. The capacitive properties of the MnO2 are investigated by cyclic voltammetry (CV) and constant current charge-discharge. The SEM results showed that the MnO2 micropowders are assembled by numerous one-dimensional MnO2 nanosilks. These MnO2 nanosilks are found to be 30-50 nm in diameter and characteristic length up to 2 pm. When evaluated for supercapacitor electrode, a desirable specific capacitance of 135 F/g for the single MnO2 electrode is obtained at current density of 0.15 A/g in 1 M Na2SO4 aqueous solution. (C) 2014 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
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