Synthesis of a MnO2–graphene foam hybrid with controlled MnO2 particle shape and its use as a supercapacitor electrode

A simple approach was developed to synthesize the three-dimensional (3D) hybrid of manganese dioxide (MnO2) and graphene foam. The morphology of the MnO2 nanostructures can be readily controlled by the solution acidity. Furthermore, we demonstrate that, serving as a free-standing supercapacitor elec...

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Bibliographic Details
Published in:Carbon (New York) 2012-11, Vol.50 (13), p.4865-4870
Main Authors: Dong, Xiaochen, Wang, Xuewan, Wang, Jing, Song, Hao, Li, Xingao, Wang, Lianhui, Chan-Park, Mary B., Li, Chang Ming, Chen, Peng
Format: Article
Language:English
Subjects:
Capacitors
Chemistry
Colloidal state and disperse state
Cross-disciplinary physics: materials science
rheology
Current density
Electrodes
Emulsions. Microemulsions. Foams
Exact sciences and technology
Foams
Fullerenes and related materials
diamonds, graphite
General and physical chemistry
Graphene
Materials science
Nanostructure
Physics
Specific materials
Supercapacitors
Three dimensional
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Summary:A simple approach was developed to synthesize the three-dimensional (3D) hybrid of manganese dioxide (MnO2) and graphene foam. The morphology of the MnO2 nanostructures can be readily controlled by the solution acidity. Furthermore, we demonstrate that, serving as a free-standing supercapacitor electrode, this novel three-dimensional hybrid gives a remarkable specific capacitance (560F/g at the current density of 0.2A/g) and excellent cycling stability.
ISSN:0008-6223
1873-3891
DOI:10.1016/j.carbon.2012.06.014