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

doi:10.1149/2.032207jes

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 journal › Article

33 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 language	English
Pages (from-to)	A967-A971
Journal	Journal of the Electrochemical Society
Volume	159
Issue number	7
DOIs	https://doi.org/10.1149/2.032207jes
Publication status	Published - 2012 Dec 1
Externally published	Yes

ASJC Scopus subject areas

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

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Seki, S., Serizawa, N., Hayamizu, K., Tsuzuki, S., Umebayashi, Y., Takei, K., & Miyashiro, H. (2012). Physicochemical and Electrochemical Properties of 1-Ethyl-3- Methylimidazolium Tris(pentafluoroethyl)trifluorophosphate and 1-Ethyl-3-Methylimidazolium Tetracyanoborate. Journal of the Electrochemical Society, 159(7), A967-A971. https://doi.org/10.1149/2.032207jes

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, 01.12.2012, p. A967-A971.

Research output: Contribution to journal › Article

Seki, S, Serizawa, N, Hayamizu, K, Tsuzuki, S, Umebayashi, Y, Takei, K & Miyashiro, H 2012, 'Physicochemical and Electrochemical Properties of 1-Ethyl-3- Methylimidazolium Tris(pentafluoroethyl)trifluorophosphate and 1-Ethyl-3-Methylimidazolium Tetracyanoborate', Journal of the Electrochemical Society, vol. 159, no. 7, pp. A967-A971. https://doi.org/10.1149/2.032207jes

Seki, Shiro ; Serizawa, Nobuyuki ; Hayamizu, Kikuko ; Tsuzuki, Seiji ; Umebayashi, Yasuhiro ; Takei, Katsuhito ; Miyashiro, Hajime. / Physicochemical and Electrochemical Properties of 1-Ethyl-3- Methylimidazolium Tris(pentafluoroethyl)trifluorophosphate and 1-Ethyl-3-Methylimidazolium Tetracyanoborate. In: Journal of the Electrochemical Society. 2012 ; Vol. 159, No. 7. pp. A967-A971.

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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.",

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AU - Hayamizu, Kikuko

AU - Tsuzuki, Seiji

AU - Umebayashi, Yasuhiro

AU - Takei, Katsuhito

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