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A Reversible Redox Strategy for SWCNT‐Based Supercapacitors Using a High‐Performance Electrolyte
Author(s) -
Yu Haijun,
Wu Jihuai,
Lin Jianming,
Fan Leqing,
Huang Miaoliang,
Lin Youzhen,
Li Yan,
Yu Fuda,
Qiu Zhaoyuan
Publication year - 2013
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201200816
Subject(s) - supercapacitor , electrolyte , redox , capacitance , electrode , carbon nanotube , materials science , nanotechnology , chemical engineering , chemistry , engineering , metallurgy
In order to achieve pesudocapacitive performance of single‐wall carbon nanotube (SWCNT) electrodes, a high‐efficient and reversible redox strategy utilizing a redox‐mediated electrolyte for SWCNT‐based supercapacitors is reported. In this novel redox‐mediated electrolyte, the single‐electrode specific capacitance of the supercapacitor is heightened four times, reaching C =162.66 F g −1 at 1 A g −1 . The quick charge‐discharge ability of the supercapacitor is also enhanced, and the relaxation time is as low as 0.58 s. Furthermore, the supercapacitor shows an excellent cycling performance of 96.51 % retention after 4000 cycles. The remarkable results presented here illustrate that the redox strategy is a facile and straightforward approach to improve the performances of SWCNT electrodes.