Electric Double Layer Capacitance of Activated Carbon Nanofibers in Ionic Liquid: EMImBF4
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概要
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The double layer capacitance of an activated carbon nanofiber (ACNF) with a 100∼200 nm fiber-diameter, prepared by the polymer blend spinning technique, was investigated using 1-ethyl-3-methylimidazolium tetrafluoroborate (EMImBF4) as the electrolyte. The conventional activated carbon fiber (ACF) with the fiber-diameter of ∼10 µm and narrow micropores (∼0.7 nm pore-width) showed a significant irreversible adsorption of EMIm+ cation in EMImBF4, however, the ACNF effectively suppress the irreversibility even with the pore structure comparable to the conventional ACF. This suggests the effect of the short pass length on the ion adsorbing/desorbing process. The decreased capacitance by the cycling in EMImBF4 was recovered by the addition of propylene carbonate as an organic solvent to the electrolyte. This means that the irreversible adsorbed ions can be desorbed using propylene carbonate.
- 公益社団法人 電気化学会の論文
著者
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Hagiwara Rika
Department Of Fundamental Energy Science Graduate School Of Energy Science Kyoto University
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OYA Asao
Department of Applied Chemistry & Chemical Engineering, Faculty of Engineering, Yamaguchi University
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SHIRAISHI Soshi
Department of Chemistry, Faculty of Engineering, Gunma University
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SHIRAISHI Soshi
Department of Applied Chemistry, Faculty of Engineering, Gunma University
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SASAKI Rei
Department of Chemistry, Faculty of Engineering, Gunma University
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MIYAUCHI Takayuki
Department of Nano-Material Systems, Graduate School of Engineering, Gunma University
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NISHINA Naoya
Department of Nano-Material Systems, Graduate School of Engineering, Gunma University
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