Journal
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
Volume 151, Issue 2, Pages 174-178Publisher
ELSEVIER
DOI: 10.1016/j.mseb.2008.05.018
Keywords
supercapacitor; electrochemical characteristic; graphite nanoplatelet; manganese oxide
Funding
- Fundamental Research Foundation of Harbin Engineering University [HEUFT07094]
- Foundation of Harbin Innovation Fellow [2006RFQXG030, 2007RFQXG028]
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MnO2/graphite nanoplatelet (GNP) composites were prepared by hydrothermal synthesis. Their morphology and microstructure were examined by scanning electron microscopy and X-ray diffraction. Electrochemical studies indicate that the composites have excellent electrochemical properties due to the homogeneous dispersion of MnO2 nanorods on both surfaces of the GNPs with a coated structure. The maximum specific capacitance of MnO2/GNPs (based on MnO2) is 276.3 F g(-1). Such coating structure also decreases the amount of conductive filler needed to meet the requirement of an electrode material. The specific capacitance based on the composite is 158 F g(-1) by addition of only 10 wt% GNPs. The effects of microstructure of MnO2/GNPs composites and the amount of GNPs on the electrochemical properties are also discussed. (c) 2008 Elsevier B.V. All rights reserved.
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