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Fe3+/Fe2+redox electrolyte for high-performance polyaniline/SnO2supercapacitors

Authors :
LIU, Tian-tian
ZHU, Yin-hai
LIU, En-hui
LUO, Zhen-yu
HU, Tian-tian
LI, Zeng-peng
DING, Rui
Source :
Transactions of Nonferrous Metals Society of China; August 2015, Vol. 25 Issue: 8 p2661-2665, 5p
Publication Year :
2015

Abstract

The Fe3+/Fe2+redox electrolyte for use in polyaniline/tin oxide (PANI/SnO2) supercapacitors was reported. The influences of redox electrolyte based on different Fe3+/Fe2+ion pair concentrations in 1 mol/L H2SO4solution on the pseudocapacitive behaviors of PANI/SnO2supercapacitor were investigated. The electrochemical properties of the supercapacitor were studied by cyclic voltammetry (CV), galvanostatic charge–discharge (GCD), and electrochemical impedance spectroscopy (EIS) techniques. It is found that the performance of the supercapacitor is the best when the Fe3+/Fe2+concentration is 0.4 mol/L and its initial specific capacitance is 1172 F/g at an applied current density of 1 A/g. The long-term cycling experiment shows good stability with the retention of initial capacitance values of 88% after 2000 galvanostatic cycles. The experimental results testify that using Fe3+/Fe2+redox electrolyte has a good prospect for improving the performances of energy-storage devices.

Details

Language :
English
ISSN :
10036326
Volume :
25
Issue :
8
Database :
Supplemental Index
Journal :
Transactions of Nonferrous Metals Society of China
Publication Type :
Periodical
Accession number :
ejs36623872
Full Text :
https://doi.org/10.1016/S1003-6326(15)63889-4