Charge-discharge and high temperature reaction of LiCoO2 in ionic liquid electrolytes based on cyano-substituted quaternary ammonium cation

Minato Egashira; Maika Tanaka-Nakagawa; Izumi Watanabe; Shigeto Okada; Jun ichi Yamaki

doi:10.1016/j.jpowsour.2006.03.015

Charge-discharge and high temperature reaction of LiCoO₂ in ionic liquid electrolytes based on cyano-substituted quaternary ammonium cation

Minato Egashira, Maika Tanaka-Nakagawa, Izumi Watanabe, Shigeto Okada, Jun ichi Yamaki

Department of Advanced Device Materials

Research output: Contribution to journal › Article › peer-review

25 Citations (Scopus)

Abstract

The charge-discharge performance of LiCoO₂ positive electrode was observed in a mixed electrolyte system consisting of two ionic liquids: cyano-substituted quaternary ammonium bis(trifluoromethane)sulfoneimide (TFSI) and a same-anion salt of 1-ethyl-3-methyl imidazolium (EMI). The positive electrode exhibited a discharge capacity rather close to the theoretical one when N,N,N,N-cyanoethyl trimethyl ammonium salt was applied. Differential scanning calorimetry (DSC) studies revealed that these electrolytes exhibited exotherm only around 260 °C, 50 °C higher than conventional carbonate-based electrolytes. This is the first attempt to reveal the thermal stability of ionic liquid electrolyte under a practical situation.

Original language	English
Pages (from-to)	1387-1390
Number of pages	4
Journal	Journal of Power Sources
Volume	160
Issue number	2 SPEC. ISS.
DOIs	https://doi.org/10.1016/j.jpowsour.2006.03.015
Publication status	Published - Oct 6 2006

All Science Journal Classification (ASJC) codes

Renewable Energy, Sustainability and the Environment
Energy Engineering and Power Technology
Physical and Theoretical Chemistry
Electrical and Electronic Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.jpowsour.2006.03.015

Cite this

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title = "Charge-discharge and high temperature reaction of LiCoO2 in ionic liquid electrolytes based on cyano-substituted quaternary ammonium cation",

abstract = "The charge-discharge performance of LiCoO2 positive electrode was observed in a mixed electrolyte system consisting of two ionic liquids: cyano-substituted quaternary ammonium bis(trifluoromethane)sulfoneimide (TFSI) and a same-anion salt of 1-ethyl-3-methyl imidazolium (EMI). The positive electrode exhibited a discharge capacity rather close to the theoretical one when N,N,N,N-cyanoethyl trimethyl ammonium salt was applied. Differential scanning calorimetry (DSC) studies revealed that these electrolytes exhibited exotherm only around 260 °C, 50 °C higher than conventional carbonate-based electrolytes. This is the first attempt to reveal the thermal stability of ionic liquid electrolyte under a practical situation.",

author = "Minato Egashira and Maika Tanaka-Nakagawa and Izumi Watanabe and Shigeto Okada and Yamaki, {Jun ichi}",

note = "Funding Information: This work has been supported by CREST of JST (Japan Science and Technology Agency).",

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doi = "10.1016/j.jpowsour.2006.03.015",

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T1 - Charge-discharge and high temperature reaction of LiCoO2 in ionic liquid electrolytes based on cyano-substituted quaternary ammonium cation

AU - Egashira, Minato

AU - Tanaka-Nakagawa, Maika

AU - Watanabe, Izumi

AU - Okada, Shigeto

AU - Yamaki, Jun ichi

N1 - Funding Information: This work has been supported by CREST of JST (Japan Science and Technology Agency).

PY - 2006/10/6

Y1 - 2006/10/6

N2 - The charge-discharge performance of LiCoO2 positive electrode was observed in a mixed electrolyte system consisting of two ionic liquids: cyano-substituted quaternary ammonium bis(trifluoromethane)sulfoneimide (TFSI) and a same-anion salt of 1-ethyl-3-methyl imidazolium (EMI). The positive electrode exhibited a discharge capacity rather close to the theoretical one when N,N,N,N-cyanoethyl trimethyl ammonium salt was applied. Differential scanning calorimetry (DSC) studies revealed that these electrolytes exhibited exotherm only around 260 °C, 50 °C higher than conventional carbonate-based electrolytes. This is the first attempt to reveal the thermal stability of ionic liquid electrolyte under a practical situation.

AB - The charge-discharge performance of LiCoO2 positive electrode was observed in a mixed electrolyte system consisting of two ionic liquids: cyano-substituted quaternary ammonium bis(trifluoromethane)sulfoneimide (TFSI) and a same-anion salt of 1-ethyl-3-methyl imidazolium (EMI). The positive electrode exhibited a discharge capacity rather close to the theoretical one when N,N,N,N-cyanoethyl trimethyl ammonium salt was applied. Differential scanning calorimetry (DSC) studies revealed that these electrolytes exhibited exotherm only around 260 °C, 50 °C higher than conventional carbonate-based electrolytes. This is the first attempt to reveal the thermal stability of ionic liquid electrolyte under a practical situation.

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