Synthesis and capacitive properties of manganese oxide nanosheets dispersed on functionalized graphene sheets

Zhang, Jintao, Jiang, Jianwen and Zhao, X. S. (2011) Synthesis and capacitive properties of manganese oxide nanosheets dispersed on functionalized graphene sheets. Journal of Physical Chemistry C, 115 14: 6448-6454. doi:10.1021/jp200724h


Author Zhang, Jintao
Jiang, Jianwen
Zhao, X. S.
Title Synthesis and capacitive properties of manganese oxide nanosheets dispersed on functionalized graphene sheets
Journal name Journal of Physical Chemistry C   Check publisher's open access policy
ISSN 1932-7447
1932-7455
Publication date 2011-04
Sub-type Article (original research)
DOI 10.1021/jp200724h
Volume 115
Issue 14
Start page 6448
End page 6454
Total pages 7
Place of publication Washington, DC, United States
Publisher American Chemical Society
Collection year 2012
Language eng
Formatted abstract
Functionalized graphene was prepared by reducing functionalized graphene oxide with poly(diallyldimethylammonium chloride) (PDDA), transferring the surface charge of reduced graphene oxide (RGO) from negative to positive. A composite material of functionalized RGO with manganese dioxide (MnO 2) nanosheets can be obtained by dispersing negatively charged MnO2 nanosheets on the functionalized RGO sheets via an electrostatic coprecipitation method. The structures of composites were investigated by high-resolution transmission electron microscopy (HRTEM), which indicated that the MnO2 nanosheets dispersed on functionalized RGO sheets, exhibiting a layered structure. The composite material exhibited enhanced capacitive performances than those of pure functionalized RGO and Na-typed birnessite (Na/MnO2) sheets, attributing to the synergic effect of both components. Additionally, over 89% of original capacitance was retained after 1000 cycles, indicating a good cycle stability of the composite materials.
Keyword Exfoliated Graphite Oxide
Electrochemical Capacitors
Supercapacitor Electrodes
Temperature Synthesis
Aqueous Dispersions
High-Performance
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status Non-UQ
Additional Notes Published: March 21, 2011

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Non HERDC
 
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