Physicochemical and Electrochemical Properties of 1-Ethyl-3- Methylimidazolium Tris(pentafluoroethyl)trifluorophosphate and 1-Ethyl-3-Methylimidazolium Tetracyanoborate

Shiro Seki, Nobuyuki Serizawa, Kikuko Hayamizu, Seiji Tsuzuki, Yasuhiro Umebayashi, Katsuhito Takei, Hajime Miyashiro

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

The physicochemical (e.g., density, viscosity, ionic conductivity, and self-diffusion coefficient) and electrochemical (e.g., electrochemical window and electric double-layer capacitor performance) properties of two new types of room-temperature ionic liquids, 1-ethyl-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate (EMIm-FAP) and 1-ethyl-3- methylimidazolium tetracyanoborate (EMIm-TCB), were investigated and compared. EMIm-FAP showed a wider electrochemical window with a carbon working electrode compared with EMIm-TCB, in spite of lower viscosity, larger self-diffusion coefficients and higher ionic conductivity. Also, the electric double-layer capacitor using EMIm-FAP shows better cycle reversibility and higher charge/discharge voltage operation (over 3 V) than that using EMIm-TCB.

Original languageEnglish
JournalJournal of the Electrochemical Society
Volume159
Issue number7
DOIs
Publication statusPublished - 2012
Externally publishedYes

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electrochemical capacitors
Ionic conductivity
Electrochemical properties
ion currents
diffusion coefficient
Viscosity
viscosity
Ionic Liquids
Ionic liquids
Carbon
cycles
Electrodes
electrodes
carbon
Electric potential
electric potential
room temperature
liquids
Temperature
Supercapacitor

ASJC Scopus subject areas

  • Electrochemistry
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Surfaces, Coatings and Films
  • Renewable Energy, Sustainability and the Environment
  • Condensed Matter Physics

Cite this

Physicochemical and Electrochemical Properties of 1-Ethyl-3- Methylimidazolium Tris(pentafluoroethyl)trifluorophosphate and 1-Ethyl-3-Methylimidazolium Tetracyanoborate. / Seki, Shiro; Serizawa, Nobuyuki; Hayamizu, Kikuko; Tsuzuki, Seiji; Umebayashi, Yasuhiro; Takei, Katsuhito; Miyashiro, Hajime.

In: Journal of the Electrochemical Society, Vol. 159, No. 7, 2012.

Research output: Contribution to journalArticle

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AU - Hayamizu, Kikuko

AU - Tsuzuki, Seiji

AU - Umebayashi, Yasuhiro

AU - Takei, Katsuhito

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