Fabrication of flexible polypyrrole/graphene oxide/manganese oxide supercapacitor

Summary A flexible polypyrrole/graphene oxide/manganese oxide‐based supercapacitor was prepared via an electrodeposition process. The polypyrrole, graphene oxide, and manganese oxide were deposited onto a flexible and highly porous nickel foam, which acted as a current collector to enhance the elect...

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Bibliographic Details
Published in:International journal of energy research 2015-03, Vol.39 (3), p.344-355
Main Authors: Ng, C. H., Lim, H. N., Lim, Y. S., Chee, W. K., Huang, N. M.
Format: Article
Language:English
Subjects:
Capacitors
Energy storage
flexible supercapacitor
Foams
Graphene
graphene oxide
manganese oxide
Manganese oxides
Nickel
Oxides
polypyrrole
Polypyrroles
Supercapacitors
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Summary:Summary A flexible polypyrrole/graphene oxide/manganese oxide‐based supercapacitor was prepared via an electrodeposition process. The polypyrrole, graphene oxide, and manganese oxide were deposited onto a flexible and highly porous nickel foam, which acted as a current collector to enhance the electrochemical performances. The good coverage of the polypyrrole, graphene oxide, and manganese oxide onto the scaffold of the nickel foam was evidenced using field emission scanning electron microscopy and X‐ray diffraction. The manganese species, which were present in the oxidation states of Mn3+ and Mn4+, were shown using X‐ray photoelectron spectroscopy. The presence of Mn2O3 and MnO2 polymorphs was detected using Fourier transform infrared and Raman spectroscopies. The cyclic stability of the ternary supercapacitor was consistent regardless of its geometry and curvature. In contrast, an activated carbon supercapacitor possesses limited energy storage capability compared to a ternary supercapacitor, which suppresses the electrochemical performances of activated carbon. The ternary as‐fabricated supercapacitor could retain a specific capacitance of 96.58% after 1000 cycles, and the as‐synthesized energy storage device was able to light up a light emitting diode. Copyright © 2014 John Wiley & Sons, Ltd.
ISSN:0363-907X
1099-114X
DOI:10.1002/er.3247