Addition of multiwalled carbon nanotube and graphene nanosheet in cobalt oxide film for enhancement of capacitance in electrochemical capacitors

Title
Addition of multiwalled carbon nanotube and graphene nanosheet in cobalt oxide film for enhancement of capacitance in electrochemical capacitors
Authors
한성환
Keywords
Electrochemical capacitor; Cobalt oxide; Multiwalled carbon nanotubes; Graphene nanosheets; Electrochemical impedance spectroscopy
Issue Date
2013-04
Publisher
한국물리학회
Citation
Current Applied Physics, April 2013, 13(1), P.196-204, 9P.
Abstract
In order to enhance the capacitance of electrochemical capacitors, multiwalled carbon nanotubes (MWCNTs) and graphene nanosheets (GNS) were added to cobalt oxide (Co3O4) paste. The composite film based on Co3O4/MWCNT/GNS (95:4:1 wt%) exhibited a capacitance of 294 F/g while the capacitance of Co3O4/MWCNT (95:5 wt%) and pure Co3O4 film is 205 and 163 F/g, respectively. The enhanced capacitance of Co3O4/MWCNT/GNS composite film was attributed to the electrochemical contributions of the Co3O4 nanoparticle attached to the GNS as well as their significantly increased specific surface areas by MWCNTs. Furthermore, the composite films showed faradaic redox capacitive behavior to doublelayer capacitive behavior due to the different nanostructures of the composites. (C) 2012 Elsevier B.V. All rights reserved.
URI
https://www.sciencedirect.com/science/article/pii/S1567173912002945?via%3Dihubhttp://hdl.handle.net/20.500.11754/44101
ISSN
1567-1739
DOI
http://dx.doi.org/10.1016/j.cap.2012.07.009
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > CHEMISTRY(화학과) > Articles
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