Electric Double Layer Capacitance of Activated Carbon Fibers in Ionic Liquid: EMImBF4

• SHIRAISHI Soshi

  Department of Nano-Material Systems, Graduate School of Engineering, Gunma University

• NISHINA Naoya

  Department of Nano-Material Systems, Graduate School of Engineering, Gunma University

• OYA Asao

  Department of Nano-Material Systems, Graduate School of Engineering, Gunma University

• HAGIWARA Rika

  Department of Fundamental Energy Science, Graduate School of Energy Science, Kyoto University

書誌事項

タイトル別名

• Electric Double Layer Capacitance of Activated Carbon Fibers in Ionic Liquid : EMImBF₄

抄録

The double layer capacitance properties of activated carbon fibers (ACFs) in 1-ethyl-3-methylimidazolium tetrafluoroborate (EMImBF₄) were discussed in comparison with propylene carbonate solution of 0.5 M (C₂H₅)₄NBF₄ (TEABF₄/PC) as typical organic electrolyte for electric double layer capacitor (EDLC). In the case of using TEABF₄/PC, the ACF electrodes showed very stable cycle-ability of the capacitance, but narrow micropores caused small capacitances by strong ion-sieving to TEA⁺ cation. The capacitance of the ACFs in EMImBF₄ were higher than those in TEABF₄/PC. However, their capacitances of the ACFs with narrow micropores dramatically decreased with the increasing cycle number, indicating that EMIm⁺ is adsorbed in the micropore irreversibly. The capacitance behavior of the ACFs in EMImBF₄ can be explained by the stereo-chemical matching of the plane-like structure of EMIm⁺ cation with slit-like micropore of ACF and a strong adsorption of EMIm⁺ and carbon surface. Ketjen black (mesoporous carbon black) had high capacitance and good cycle-ability in EMImBF₄ regardless of comparably low surface area to the ACF with narrow micropores. It suggests that wide-pore such as mesopores is effective in ion adsorption/desorption in EMImBF₄.

収録刊行物

• Electrochemistry

  Electrochemistry 73 (8), 593-596, 2005-08-05

  公益社団法人　電気化学会

キーワード

• Electric Double Layer Capacitance
• Activated Carbons
• Ionic Liquid
• Ketjen Black

詳細情報

• CRID: 1390001288142873088
• NII論文ID: 10015418667
• NII書誌ID: AN00151637
• DOI: 10.5796/electrochemistry.73.593
• ISSN: 21862451
• ISSN: 13443542
• ISSN: http://id.crossref.org/issn/13443542
• NDL書誌ID: 7445084
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7445084
• Web Site: https://www.jstage.jst.go.jp/article/electrochemistry/73/8/73_593/_pdf
• 本文言語コード: en
• データソース種別:
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  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用可