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High–rate electrochemical capacitors from highly graphitic carbon–tipped manganese oxide/mesoporous carbon/manganese oxide hybrid nanowires.

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High–rate electrochemical capacitors from highly graphitic carbon–tipped manganese oxide/mesoporous carbon/manganese oxide hybrid nanowires.

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Title: High–rate electrochemical capacitors from highly graphitic carbon–tipped manganese oxide/mesoporous carbon/manganese oxide hybrid nanowires.
Author: Jiang, Hao.; Yang, Liping.; Li, Chunzhong.; Yan, Chaoyi.; Lee, Pooi See.; Ma, Jan.
Copyright year: 2011
Abstract: In this paper, using manganese oxide as an example, we report the successful design and synthesis of a novel one-dimensional highly graphitic carbon-tipped manganese oxide/mesoporous carbon/ manganese oxide hybrid nanowire. The unique structure significantly improves the conductivity of metal oxide materials, which is a key limitation in pseudocapacitors. The hybrid nanowire with optimal carbon content, when applied as an electrode, exhibits superior capacitive properties in 1 M Na2SO4 aqueous solution, such as high specific capacitance (266 F g 1 at 1 A g 1 ), excellent rate capability (56.4% capacity retention at 60 A g 1 ) and outstanding cycling stability (without degradation after 1200 cycles). The energy densities achieved can be as high as 20.8Wh kg 1 , at a power density of 30 kWkg 1 . The results demonstrated that the manganese oxide in our hybrid nanomaterial was efficiently utilized with the assistance of the highly conductive graphitic carbon-tipped mesoporous carbon shell. It is reckoned that the present low-cost novel hybrid nanowire can serve as a promising electrode material for supercapacitors and other electrochemical devices.
Subject: DRNTU::Science::Chemistry::Physical chemistry::Electrochemistry.DRNTU::Engineering::Materials::Energy materials.
Type: Journal Article
Series/ Journal Title: Energy & environmental science
School: School of Materials Science and Engineering
Research Centre: Temasek Laboratories
Rights: © 2011 The Royal Society of Chemistry. This is the author created version of a work that has been peer reviewed and accepted for publication by Energy & Environmental Science, The Royal Society of Chemistry. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [DOI: http://dx.doi.org/10.1039/C1EE01032H ]
Version: Accepted version

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