A novel hybrid supercapacitor based on spherical activated carbon and spherical MnO2 in a non-aqueous electrolyte
- 26 March 2010
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of Materials Chemistry
- Vol. 20 (19), 3883-3889
- https://doi.org/10.1039/c000339e
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.Keywords
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