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Performance enhancement of single-walled nanotube-microwave exfoliated graphene oxide composite electrodes using a stacked electrode configuration

Antiohos,D, Romano,MS, Razal,JM, Beirne,S, Aitchison,P, Minett,AI, Wallace,GG and Chen,J 2014, Performance enhancement of single-walled nanotube-microwave exfoliated graphene oxide composite electrodes using a stacked electrode configuration, Journal of materials chemistry A, vol. 2, no. 36, pp. 14835-14843, doi: 10.1039/c4ta02190h.

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Title Performance enhancement of single-walled nanotube-microwave exfoliated graphene oxide composite electrodes using a stacked electrode configuration
Author(s) Antiohos,D
Romano,MS
Razal,JM
Beirne,S
Aitchison,P
Minett,AI
Wallace,GG
Chen,J
Journal name Journal of materials chemistry A
Volume number 2
Issue number 36
Start page 14835
End page 14843
Total pages 9
Publisher Royal Society of Chemistry
Place of publication London, Eng.
Publication date 2014
ISSN 2050-7488
2050-7496
Keyword(s) Science & Technology
Physical Sciences
Technology
Chemistry, Physical
Energy & Fuels
Materials Science, Multidisciplinary
Chemistry
Materials Science
CARBON-NANOTUBE
ENERGY-STORAGE
ELECTROCHEMICAL CHARACTERISTICS
HIGH-POWER
SUPERCAPACITORS
GRAPHITE
SPECTROSCOPY
FABRICATION
REDUCTION
Summary We report the development of a stacked electrode supercapacitor cell using stainless steel meshes as the current collectors and optimised single walled nanotubes (SWNT)-microwave exfoliated graphene oxide (mw rGO) composites as the electrode material. The introduction of mw rGO into a SWNT matrix creates an intertwined porous structure that enhances the electroactive surface area and capacitive performance due to the 3-D hierarchical structure that is formed. The composite structure was optimised by varying the weight ratio of the SWNTs and mw rGO. The best performing ratio was the 90% SWNT-10% mw rGO electrode which achieved a specific capacitance of 306 F g-1 (3 electrode measurement calculated at 20 mV s-1). The 90% SWNT-10% mw rGO was then fabricated into a stacked electrode configuration (SEC) which significantly enhanced the electrode performance per volume (1.43 mW h cm-3, & 6.25 W cm-3). Device testing showed excellent switching capability up to 10 A g-1, and very good stability over 10000 cycles at 1.0 A g-1 with 93% capacity retention. © the Partner Organisations 2014.
Language eng
DOI 10.1039/c4ta02190h
Field of Research 091205 Functional Materials
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2014, RSC Publications
Persistent URL http://hdl.handle.net/10536/DRO/DU:30072410

Document type: Journal Article
Collection: Institute for Frontier Materials
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