A comparative study of electrocapacitive properties of manganese dioxide clusters dispersed on different carbons

Zhang, Jintao and Zhao, X. S. (2013) A comparative study of electrocapacitive properties of manganese dioxide clusters dispersed on different carbons. Carbon, 52 1-9. doi:10.1016/j.carbon.2012.08.063


Author Zhang, Jintao
Zhao, X. S.
Title A comparative study of electrocapacitive properties of manganese dioxide clusters dispersed on different carbons
Journal name Carbon   Check publisher's open access policy
ISSN 0008-6223
1873-3891
Publication date 2013-02-01
Year available 2012
Sub-type Article (original research)
DOI 10.1016/j.carbon.2012.08.063
Volume 52
Start page 1
End page 9
Total pages 9
Place of publication Oxford, United Kingdom
Publisher Pergamon
Language eng
Formatted abstract
Manganese dioxide (MnO2) clusters were directly grown on different carbons, including reduced graphene oxide (RGO), multi-wall carbon nanotubes (CNTs), and carbon black (Vulcan XC-72), via a chelation-mediated aqueous solution method. The electrocapacitive properties of the composite materials were evaluated by using cycle voltammetry, electrochemical impedance spectroscopy (EIS), and charge/discharge techniques. The composite electrode consisting of RGO and MnO2 performed the best among the composite electrodes studied with a specific capacitance as high as 260 F/g at a current density of 0.3 A/g. EIS data revealed the smallest charge transfer resistance in electrode. The results suggest that two-dimensional (2D) RGO sheets are an excellent support for pseudocapacitive MnO2. This study provides fundamental insights into the role of a carbon support in carbon-transition- metal-oxide composite electrodes for supercapacitors.
Keyword Electrochemical Capacitors
Oxide Nanosheets
Supercapacitors
Performance
Electrodes
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2013 Collection
 
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