Improved performance of supercapacitors constructed with activated carbon papers as electrodes and vanadyl sulfate as redox electrolyte

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• 作者：Zhihui Liang ; Jinshu Wen ; Bing Guo ; Zhiyu Cheng ; Yongfu Qiu ; Pingru Xu…
• 刊名：Ionics
• 出版年：2016
• 出版时间：July 2016
• 年：2016
• 卷：22
• 期：7
• 页码：1253-1258
• 全文大小：1,623 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Electrochemistry
  Materials Science
  Physical Chemistry
  Condensed Matter
  Renewable Energy Sources
  Electrical Power Generation and Transmission
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1862-0760
• 卷排序：22

文摘

In this report, the supercapacitor was constructed with activated carbon paper as electrodes and 3 M H<sub>2sub>SO<sub>4sub> solution bearing 1 M VOSO<sub>4sub> as electrolyte. This supercapacitor showed high areal capacitance of 2146 mF/cm2 with around 16 times higher than that of 134 mF/cm2 in pristine electrolyte of 3 M H<sub>2sub>SO<sub>4sub> and good cycling performance retaining 92 % after 5000 cycles. The full-scale and enlarged Nyquist-type impedance spectra further indicate that the supercapacitor has low diffusion resistance and exhibits good power capability. Constructed by this way, the performances of supercapacitors were improved for the synergistic effect of the absorbance and catalysis of the activated carbon paper as well as redox properties of the couples VO2+/VO<sub>2sub>+.KeywordsSupercapacitorCarbon paperVanadyl sulfateElectrolyte