dc.contributor.author |
Jafta, CJ
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dc.contributor.author |
Nkosi, F
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dc.contributor.author |
Le Roux, Lukas J
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dc.contributor.author |
Mathe, Mahlanyane K
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dc.contributor.author |
Kebede, Mesfin A
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dc.contributor.author |
Makgopa, K
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dc.contributor.author |
Song, Y
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dc.contributor.author |
Tong, D
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dc.contributor.author |
Oyama, M
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dc.contributor.author |
Manyala, N
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dc.contributor.author |
Chen, S
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dc.contributor.author |
Ozoemena, KI
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dc.date.accessioned |
2014-02-28T06:52:00Z |
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dc.date.available |
2014-02-28T06:52:00Z |
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dc.date.issued |
2013-11 |
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dc.identifier.citation |
Jafta, C.J, Nkosi, F, Le Roux, L.K. Mathe, M.K, Kebede, M, Makgopa, K, Song, Y, Tong, D, Oyama, M, Manyala, N, Chen, S and Ozoemena KI. 2013. Manganese oxide/graphene oxide composites for high-energy aqueous asymmetric electrochemical capacitors. Electrochimica Acta, vol. 110, pp 228-233 |
en_US |
dc.identifier.issn |
0013-4686 |
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dc.identifier.uri |
http://ac.els-cdn.com/S0013468613012024/1-s2.0-S0013468613012024-main.pdf?_tid=0dd57430-97d8-11e3-82fe-00000aab0f02&acdnat=1392644175_05c404dec64824f5834e64bff2b0cf56
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dc.identifier.uri |
http://hdl.handle.net/10204/7254
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dc.identifier.uri |
https://www.sciencedirect.com/science/article/pii/S0013468613012024
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dc.identifier.uri |
https://doi.org/10.1016/j.electacta.2013.06.096
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dc.description |
Copyright: 2013 Elsevier. This is an ABSTRACT ONLY. The definitive version is published in Electrochimica Acta, vol. 110, pp 228-233 |
en_US |
dc.description.abstract |
A high-energy aqueous asymmetric electrochemical capacitor was developed using manganese diox-ide ( -MnO2)/graphene oxide (GO) nanocomposites. The nanostructured -MnO2was prepared frommicron-sized commercial electrolytic manganese dioxide (EMD) via a hydrothermal reaction in the pres-ence and absence of sodium dodecylsulphate (SDS), -MnO2(SDS)and -MnO2, respectively. Unlike theas-prepared -MnO2, the presence of SDS during the hydrothermal reaction conferred different mor-phologies on the intermediate precursors for the -MnO2(SDS). Also, the XRD patterns showed that the -MnO2(SDS)are more crystalline than the as-prepared -MnO2. The superior electrochemical perfor-mance of the -MnO2(SDS)/GO composite (280 F g−1, 35 Wh kg−1, and 7.5 kW kg−1at 0.5 A g−1) coupledwith excellent long cycle life clearly indicates that this electrode system has the potential of beingdeveloped as an efficient aqueous asymmetric electrochemical capacitor. The high performance of the -MnO2(SDS)/GO composite was interpreted in terms of the enhanced crystallinity of the -MnO2(SDS).Interestingly, the electrochemical performance is comparable to or even better than those reported for the more conductive graphene/MnO2composites. |
en_US |
dc.language.iso |
en |
en_US |
dc.publisher |
Elsevier |
en_US |
dc.relation.ispartofseries |
Workflow;11476 |
|
dc.subject |
Electrolytic manganese dioxide |
en_US |
dc.subject |
MnO2 |
en_US |
dc.subject |
Graphene oxide |
en_US |
dc.subject |
Asymmetric capacitor |
en_US |
dc.subject |
Aqueous electrolyte |
en_US |
dc.subject |
Energy density |
en_US |
dc.title |
Manganese oxide/graphene oxide composites for high-energyaqueous asymmetric electrochemical capacitors |
en_US |
dc.type |
Article |
en_US |
dc.identifier.apacitation |
Jafta, C., Nkosi, F., Le Roux, L. J., Mathe, M. K., Kebede, M. A., Makgopa, K., ... Ozoemena, K. (2013). Manganese oxide/graphene oxide composites for high-energyaqueous asymmetric electrochemical capacitors. http://hdl.handle.net/10204/7254 |
en_ZA |
dc.identifier.chicagocitation |
Jafta, CJ, F Nkosi, Lukas J Le Roux, Mahlanyane K Mathe, Mesfin A Kebede, K Makgopa, Y Song, et al "Manganese oxide/graphene oxide composites for high-energyaqueous asymmetric electrochemical capacitors." (2013) http://hdl.handle.net/10204/7254 |
en_ZA |
dc.identifier.vancouvercitation |
Jafta C, Nkosi F, Le Roux LJ, Mathe MK, Kebede MA, Makgopa K, et al. Manganese oxide/graphene oxide composites for high-energyaqueous asymmetric electrochemical capacitors. 2013; http://hdl.handle.net/10204/7254. |
en_ZA |
dc.identifier.ris |
TY - Article
AU - Jafta, CJ
AU - Nkosi, F
AU - Le Roux, Lukas J
AU - Mathe, Mahlanyane K
AU - Kebede, Mesfin A
AU - Makgopa, K
AU - Song, Y
AU - Tong, D
AU - Oyama, M
AU - Manyala, N
AU - Chen, S
AU - Ozoemena, KI
AB - A high-energy aqueous asymmetric electrochemical capacitor was developed using manganese diox-ide ( -MnO2)/graphene oxide (GO) nanocomposites. The nanostructured -MnO2was prepared frommicron-sized commercial electrolytic manganese dioxide (EMD) via a hydrothermal reaction in the pres-ence and absence of sodium dodecylsulphate (SDS), -MnO2(SDS)and -MnO2, respectively. Unlike theas-prepared -MnO2, the presence of SDS during the hydrothermal reaction conferred different mor-phologies on the intermediate precursors for the -MnO2(SDS). Also, the XRD patterns showed that the -MnO2(SDS)are more crystalline than the as-prepared -MnO2. The superior electrochemical perfor-mance of the -MnO2(SDS)/GO composite (280 F g−1, 35 Wh kg−1, and 7.5 kW kg−1at 0.5 A g−1) coupledwith excellent long cycle life clearly indicates that this electrode system has the potential of beingdeveloped as an efficient aqueous asymmetric electrochemical capacitor. The high performance of the -MnO2(SDS)/GO composite was interpreted in terms of the enhanced crystallinity of the -MnO2(SDS).Interestingly, the electrochemical performance is comparable to or even better than those reported for the more conductive graphene/MnO2composites.
DA - 2013-11
DB - ResearchSpace
DP - CSIR
KW - Electrolytic manganese dioxide
KW - MnO2
KW - Graphene oxide
KW - Asymmetric capacitor
KW - Aqueous electrolyte
KW - Energy density
LK - https://researchspace.csir.co.za
PY - 2013
SM - 0013-4686
T1 - Manganese oxide/graphene oxide composites for high-energyaqueous asymmetric electrochemical capacitors
TI - Manganese oxide/graphene oxide composites for high-energyaqueous asymmetric electrochemical capacitors
UR - http://hdl.handle.net/10204/7254
ER -
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en_ZA |