Electrocapacitive Properties of MnFe2O4 Electrodes in Aqueous LiNO3 Electrolyte with Surfactants

Wang, Baoyan, Guo, Peizhi, Bi, Huaqing, Li, Qun, Zhang, Guoliang, Wang, Rongyue, Liu, Jingquan and Zhao, X. S. (2013) Electrocapacitive Properties of MnFe2O4 Electrodes in Aqueous LiNO3 Electrolyte with Surfactants. International Journal of Electrochemical Science, 8 7: 8966-8977.

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Author Wang, Baoyan
Guo, Peizhi
Bi, Huaqing
Li, Qun
Zhang, Guoliang
Wang, Rongyue
Liu, Jingquan
Zhao, X. S.
Title Electrocapacitive Properties of MnFe2O4 Electrodes in Aqueous LiNO3 Electrolyte with Surfactants
Formatted title
Electrocapacitive Properties of MnFe2O4 Electrodes in Aqueous LiNO3 Electrolyte with Surfactants
Journal name International Journal of Electrochemical Science
ISSN 1452-3981
Publication date 2013-07
Year available 2013
Sub-type Article (original research)
Open Access Status File (Publisher version)
Volume 8
Issue 7
Start page 8966
End page 8977
Total pages 12
Place of publication Serbia
Publisher Electrochemical Science Group
Collection year 2014
Language eng
Formatted abstract
The electrocapacitive properties of MnFe2O4 hollow spheres and colloidal nanocrystal clusters in electrolyte LiNO3 containing surfactants were studied. Electrochemical performances of supercapacitors were evaluated by cyclic voltammetry (CV), galvanostatic charge–discharge, self-discharge, cycle stability and electrochemical impedance spectroscopy (EIS). Results showed that the MnFe2O4 colloidal nanocrystal clusters electrode displayed a higher capacitance than that of MnFe2O4 hollow sphere. Anionic surfactant sodium dodecyl sulphate (SDS) and non-ionic surfactant p-t-octylophenol (Triton-X-100) and poly(ethylene glycol)-block-poly(propylene glycol)-block-Poly(ethylene glycol) (P123) were added respectively to LiNO3 electrolyte to investigate capacitive features of MnFe2O4-nanocrystal-based supercapacitors. It was found that lowering the interfacial tension between the electrode and electrolyte favoured the diffusion of lithium ions. For example, surfactant SDS enhanced 36.8% capacitance with an energy density of 14.5 Wh/Kg at the current density of 0.05 A/g, and the capacitive retention was 82% after 1000 cycles. However, the capacitance
improves about 22.8% and 12.8% after the addition of Triton-X-100 and P123, respectively. Based on the experimental results, the enhancement mechanism of surfactants on the electrochemical performances of the as prepared supercapacitors was proposed.
Keyword Manganese ferrite
Colloidal nanocrystal cluster
Supercapacitor
Surfactant
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2014 Collection
 
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