Cycling stability of a hybrid activated carbon//poly(3-methylthiophene) supercapacitor with N-butyl-N-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide ionic liquid as electrolyte |
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Authors: | Andrea Balducci Wesley A Henderson Stefano Passerini Francesca Soavi |
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Affiliation: | a UCI-Scienze Chimiche Radiochimiche e Metallurgiche, Università di Bologna, Via San Donato 15-40127 Bologna, Italy b CIRIMAT, UMR CNRS 5085, 118 Route de Narbonne, Toulouse Cedex 31062, France c ENEA (Italian National Agency for New Technologies, Energy and Environment), IDROCOMB, Casaccia Research Center, Via Anguillarese 301, 00060 Rome, Italy |
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Abstract: | A long cycle-life, high-voltage supercapacitor featuring an activated carbon//poly(3-methylthiophene) hybrid configuration with N-butyl-N-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide ionic liquid, a solvent-free green electrolyte, was developed. The cyclability of a laboratory scale cell with electrode mass loading sized for practical uses was tested at 60 °C over 16,000 galvanostatic charge-discharge cycles at 10 mA cm−2 in the 1.5 and 3.6 V voltage range. The reported average and maximum specific energy and power, specific capacitance and capacity, equivalent series resistance and coulombic efficiency over cycling demonstrate the long-term viability of this ionic liquid as green electrolyte for high-voltage hybrid supercapacitors. |
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Keywords: | Hybrid supercapacitor Ionic liquid Poly(3-methylthiophene) Activated carbon Cycle-life |
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