The preparation of quaternary ammonium-based ionic liquid containing a cyano group and its properties in a lithium battery electrolyte

Minato Egashira, Shigeto Okada, Jun Ichi Yamaki, Diego Alejandro Dri, Francesco Bonadies, Bruno Scrosati

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101 Citations (Scopus)

Abstract

A room temperature ionic liquid consisting of N,N,N,N,-cyanomethyl trimethyl ammonium (CTMA) cation and bis(trifluoromethane sulfone)imide (TFSI) anion was newly synthesized, and its electrochemical properties were investigated. This ionic liquid has a melting point of 35°C and an order of conductivity of 10-4 S cm-1. Lithium deposition/ dissolution tests in 0.2 mol dm-3 LiTFSI/CTMATFSI electrolytes showed an improved cycle behavior compared with that of a Li electrolyte based on a tetraalkylammonium ionic liquid without a cyano group. It is suggested that such an improvement may be associated with the formation of a protective film on the lithium surface. Introducing a proper functional group is suggested to be effective to improve the interfacial properties of ionic liquid.

Original languageEnglish
Pages (from-to)240-244
Number of pages5
JournalJournal of Power Sources
Volume138
Issue number1-2
DOIs
Publication statusPublished - Nov 15 2004

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

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