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
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
Collection year 2013
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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