Impedance Spectroscopic Study Using Nanoporous Electrode on Room Temperature Ionic Liquid-propanol Mixtures

• ABE Hiroshi

  Department of Materials Science and Engineering, National Defense Academy

• AONO Masami

  Department of Materials Science and Engineering, National Defense Academy

• KAMEOKA Satoshi

  Institute of Multidisciplinary Research Advanced Materials, Tohoku University

• TSAI An-Pan

  Institute of Multidisciplinary Research Advanced Materials, Tohoku University

• YOSHIMURA Yukihiro

  Department of Applied Chemistry, National Defense Academy

• OZAWA Shinichiro

  Department of Materials Science and Engineering, National Defense Academy

抄録

AC impedance spectroscopic approach is applied into room temperature ionic liquid (RTIL) based mixtures. The RTIL is hydrophobic 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide, [C₂mim][TFSI]. For higher efficient electric double layer capacitor (EDLC) as an energy storage device, Cu3Au nanoporous electrode is assembled in the [C₂mim][TFSI]-propanol mixtures. Due to high cost and high viscosity of the pure [C₂mim][TFSI], an additive is required in order to achieve the low cost and quick electrochemical response for rapid charge/discharge. Propanol having relative low vapor pressure among alcohols is adequate to reduce viscosity of the hydrophobic RTILs. With nanoporous metallic electrode, the EDL capacitance in the mixtures exceed that in the pure [C₂mim][TFSI]. Also, the capacitance in the mixtures was large enough up to 80 mol% propanol. In addition, isomer effect of propanol was seen in the AC impedance spectra.

収録刊行物

• 日本エネルギー学会誌

  日本エネルギー学会誌 93 (10), 1015-1020, 2014

  一般社団法人 日本エネルギー学会

キーワード

• Room temperature ionic liquid
• AC impedance spectroscopy
• Electric double layer
• Nanoporous electrode
• Propanol isomer effect

詳細情報

• CRID: 1390001204357271936
• NII論文ID: 130004706547
• DOI: 10.3775/jie.93.1015
• ISSN: 18826121
• ISSN: 09168753
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可