کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1786054 | 1023403 | 2015 | 4 صفحه PDF | دانلود رایگان |
• Lithium-modified silica nanosalt (Li202) is used as a gel-forming additive in 1.5 M TEABF4/acetonitrile for a supercapacitor.
• The electrochemical stability of the electrolyte is improved over 4.0 V.
• The Li202 can be considered as a promising electrolyte additive for supercapacitors.
In this work, lithium-modified silica nanosalt (Li202) is solution-synthesized and used as a gel-forming additive in 1.5 M tetraethylammonium tetrafluoroborate (TEABF4)/acetonitrile (ACN) electrolyte solution for the supercapacitor with activated carbon electrode. The electrochemical properties of the supercapacitor adopting the Li202 (5 wt.%) are investigated using linear sweep voltammetry, cyclic voltammetry, and complex impedance spectroscopy. By the addition of the Li202, the electrochemical stability of the electrolyte is improved over 4.0 V (corresponding to the current density below 0.6 mA cm−2) and higher specific capacitances at the scan rates of 10–500 mV s−1 are obtained. Thus, the Li202 can be considered as a promising electrolyte additive to enhance the supercapacitive properties of activated carbon electrode.
Journal: Current Applied Physics - Volume 15, Issue 4, April 2015, Pages 567–570