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A Reversible Redox Strategy for SWCNT‐Based Supercapacitors Using a High‐Performance Electrolyte

2013; Wiley; Volume: 14; Issue: 2 Linguagem: Inglês

10.1002/cphc.201200816

1439-7641

Haijun Yu, Jihuai Wu, Jianming Lin, Leqing Fan, Miaoliang Huang, Youzhen Lin, Yan Li, Fu‐Da Yu, Zhaoyuan Qiu,

Advancements in Battery Materials

Abstract 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.