Journal
CHEMPHYSCHEM
Volume 14, Issue 2, Pages 394-399Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cphc.201200816
Keywords
electrolytes; p-phenylenediamine; redox chemistry; single-wall carbon nanotubes; supercapacitors
Funding
- National High Technology Research and Development Program of China [2009AA03Z217]
- National Natural Science Foundation of China [90922028, 50842027]
- Chinese Ministry of Education [211204]
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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 Fg1 at 1 Ag1. 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.
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