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Issue 19, 2010
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A novel hybrid supercapacitor based on spherical activated carbon and spherical MnO2 in a non-aqueous electrolyte

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Abstract

A novel non-aqueous hybrid supercapacitor was fabricated from two spherical materials – an activated mesocarbon microbead (AMCMB) and MnO2 nanowire-sphere, as the negative and positive electrodes, respectively. The preliminary results for this energy-storage device, which operates over a wide voltage range (0.0–3.0 V) using 1 M Et4NBF4 in acetonitrile (AN) as electrolytes, are presented. On the basis of a single electrode, the AMCMB|MnO2 supercapacitor displays a high specific capacitance of 228 F g−1 at a scan rate of 10 mV s−1, corresponding to specific energy of 128 W h kg−1 based on based on the total mass of active materials, while maintaining desirable cycling stability and rate capability. The combination of the spherical AMCMB and MnO2 in a non-aqueous electrolyte is proved to be suitable for high-performance hybrid supercapacitor applications.

Graphical abstract: A novel hybrid supercapacitor based on spherical activated carbon and spherical MnO2 in a non-aqueous electrolyte

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Article information


Submitted
07 Jan 2010
Accepted
15 Feb 2010
First published
26 Mar 2010

J. Mater. Chem., 2010,20, 3883-3889
Article type
Paper

A novel hybrid supercapacitor based on spherical activated carbon and spherical MnO2 in a non-aqueous electrolyte

H. Wang, Z. Li, Y. Huang, Q. Li and X. Wang, J. Mater. Chem., 2010, 20, 3883
DOI: 10.1039/C000339E

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