Abstract
Butylmethylpyrrolidinium-dicyanamide (BMP-DCA) ionic liquid (IL), which enables the pseudocapacitive behavior of a MnO2 electrode, performing over a wide potential range of 3 V, is considered to be a promising electrolyte for supercapacitors. Various additives are doped in this IL electrolyte in attempt to further improve the electrochemical performance of MnO2; NaDCA is found to be the most effective. An appropriate concentration (∼0.01 M) of NaDCA in the IL can optimize the capacitance of the MnO2 electrode; the values are 100 and 125 F g-1 at 25 and 50 °C, respectively. The NaDCA-doped IL is superior to traditional aqueous electrolytes for high-energy, high-power, elevated-temperature, and long-life MnO 2 supercapacitor applications.
Original language | English |
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Pages (from-to) | 6274-6279 |
Number of pages | 6 |
Journal | Journal of Materials Chemistry |
Volume | 22 |
Issue number | 13 |
DOIs | |
State | Published - 7 Apr 2012 |