期刊
MATERIALS
卷 9, 期 9, 页码 -出版社
MDPI AG
DOI: 10.3390/ma9090734
关键词
supercapacitor; redox electrolyte; polyanilline; multi-wall carbon nanotube; synergistic effect
类别
资金
- Natural Science Foundation of China (NSFC) [51063009, 21271031, 51203012]
- Beijing Natural Science Foundation of China [2132009, 2122015]
- Beijing Municipal Commission of Education, China [TJSHG2015 11021002]
Redox electrolytes can provide significant enhancement of capacitance for supercapacitors. However, more important promotion comes from the synergetic effect and matching between the electrode and electrolyte. Herein, we report a novel electrochemical system consisted of a polyanilline/carbon nanotube composite redox electrode and a hydroquinone (HQ) redox electrolyte, which exhibits a specific capacitance of 7926 F/g in a three-electrode system when the concentration of HQ in H2SO4 aqueous electrolyte is 2 mol/L, and the maximum energy density of 114 Wh/kg in two-electrode symmetric configuration. Moreover, the specific capacitance retention of 96% after 1000 galvanostatic charge/discharge cycles proves an excellent cyclic stability. These ultrahigh performances of the supercapacitor are attributed to the synergistic effect both in redox polyanilline-based electrolyte and the redox hydroquinone electrode.
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