Electrochemical properties of manganese ferrite-based supercapacitors in aqueous electrolyte: the effect of ionic radius

Wang, Rongyue, Li, Qun, Cheng, Lulu, Li, Hongliang, Wang, Baoyan, Zhao, X. S. and Guo, Peizhi (2014) Electrochemical properties of manganese ferrite-based supercapacitors in aqueous electrolyte: the effect of ionic radius. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 457 1: 94-99. doi:10.1016/j.colsurfa.2014.05.059

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Author Wang, Rongyue
Li, Qun
Cheng, Lulu
Li, Hongliang
Wang, Baoyan
Zhao, X. S.
Guo, Peizhi
Title Electrochemical properties of manganese ferrite-based supercapacitors in aqueous electrolyte: the effect of ionic radius
Journal name Colloids and Surfaces A: Physicochemical and Engineering Aspects   Check publisher's open access policy
ISSN 1873-4359
0927-7757
Publication date 2014-09-05
Year available 2014
Sub-type Article (original research)
DOI 10.1016/j.colsurfa.2014.05.059
Volume 457
Issue 1
Start page 94
End page 99
Total pages 6
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2015
Language eng
Formatted abstract
The electrochemical performances of symmetric supercapacitors assembled by MnFe2O4 colloidal nanocrystal clusters (CNCs) in aqueous electrolytes were investigated by using cyclic voltammetry, galvanostatic charge-discharge, cycle stability and electrochemical impedance spectroscopy. Results showed that the capacitance of MnFe2O4 CNCs can be easily adjusted by the controlled electrolytes. It was found that the specific capacitances of CNCs-based electrodes were 97.1, 93.9, 74.2 and 47.4Fg-1 for the electrolytes (2M) containing KOH, NaOH, LiOH and Na2SO4, respectively, at the current density of 0.1Ag-1. The capacitance of the electrode was increased from 56.9 to 152.5Fg-1 with aqueous KOH electrolytes changed from 0.5M to 6M. The MnFe2O4 CNCs-based supercapacitor using aqueous KOH (6M) electrolyte displayed the best cycle stability among all the supercapacitors. Based on the experimental results, the enhancement mechanism of electrochemical performances for the CNCs-based supercapacitors was proposed.
Keyword MnFe2O4
Colloidal nanocrystal cluster
Supercapacitor
Electrolyte
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 2015 Collection
 
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