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Issue 11, 2014
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Enhanced capacitor effects in polyoxometalate/graphene nanohybrid materials: a synergetic approach to high performance energy storage

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Abstract

A synergetic combination of a chemical redox reaction and a physical capacitor effect in one electrochemical cell is a promising route to realize both high-energy and high-power-density energy storage. In the present work, we studied the electrochemical properties of a nanohybrid system of polyoxometalate (POM) and graphene (RGO), in which individual POM molecules are adsorbed on the RGO surfaces. The molecular cluster battery (MCB) in which the POM/RGO hybrid was adopted as a cathode active material exhibited a higher battery capacity than the POM/SWNT (single-walled carbon nanotube)-MCB and the microcrystal POM-MCB. The observed capacity for the POM/RGO-MCB was found to be much larger than the theoretical one, as calculated from the redox changes in POM, indicating a cooperative enhancement of the capacitor effects of RGO, induced by the POMs on the RGO surfaces.

Graphical abstract: Enhanced capacitor effects in polyoxometalate/graphene nanohybrid materials: a synergetic approach to high performance energy storage

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Publication details

The article was received on 07 Nov 2013, accepted on 27 Dec 2013 and first published on 06 Jan 2014


Article type: Paper
DOI: 10.1039/C3TA14569G
Author version available: Download Author version (PDF)
Citation: J. Mater. Chem. A, 2014,2, 3801-3807
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    Enhanced capacitor effects in polyoxometalate/graphene nanohybrid materials: a synergetic approach to high performance energy storage

    K. Kume, N. Kawasaki, H. Wang, T. Yamada, H. Yoshikawa and K. Awaga, J. Mater. Chem. A, 2014, 2, 3801
    DOI: 10.1039/C3TA14569G

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