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Issue 59, 2014
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A comparison of carbon supports in MnO2/C supercapacitors

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Abstract

This article presents a comparison of three typical carbon supports, carbon nanotubes (CNTs), reduced graphene oxide (rGO), and acetylene black (AB), with regards to their performance in MnO2 supercapacitors. To exclude the influence of MnO2, uniform-sized MnO2 nanoflakes with a width of ∼50 nm were used to fabricate three MnO2/C composites. The working electrodes were prepared using a consistent procedure to keep all three types of MnO2/C electrodes in the same configuration. The influence of these three carbon supports on capacitive performance and cyclability was studied. In particular, the capacitance contribution of carbon supports was subtracted from the overall capacitance. The contribution from MnO2 was compared among these three types of composites and it was found that rGO could enhance the capacitive performance of MnO2 at slow scan rates. However, MnO2/CNTs and MnO2/AB exhibited better capacitive performance at high rates and better stability.

Graphical abstract: A comparison of carbon supports in MnO2/C supercapacitors

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Publication details

The article was received on 24 May 2014, accepted on 04 Jul 2014 and first published on 08 Jul 2014


Article type: Paper
DOI: 10.1039/C4RA04914D
Citation: RSC Adv., 2014,4, 31416-31423
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    A comparison of carbon supports in MnO2/C supercapacitors

    C. Wei, P. S. Lee and Z. Xu, RSC Adv., 2014, 4, 31416
    DOI: 10.1039/C4RA04914D

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