Synthesis and characterization of quaternary ammonium-based ionic liquids containing an alkyl carbonate group

Quan Nguyen Dinh, Hee Oh Ji, Soo Kim Chang, Seung Wook Kim, Honggon Kim, Hyunjoo Lee, Sik Kim Hoon

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

A series of quaternary ammonium-based ionic liquids (ILs) containing an alkyl carbonate group on the cation was first prepared and their physical and electrochemical properties including density, viscosity, thermal stability, electrochemical stability, and ionic conductivity were reported. These ILs exhibited wide electrochemical windows of at least 5.0 V and relatively high conductivities. In contrast to dialkyl-substituted ionic liquids, the ILs with an alkyl carbonate group on the cation showed much smaller drop in conductivities when mixed with a lithium salt, due to the interaction of lithium ions with carbonate groups. Upon interaction with a Li salt, the carbonyl stretching frequency of the carbonate group shifted to a lower frequency whereas the peak associated with C-O single bond moved to a higher frequency.

Original languageEnglish
Pages (from-to)2299-2302
Number of pages4
JournalBulletin of the Korean Chemical Society
Volume28
Issue number12
Publication statusPublished - 2007 Dec 20

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Keywords

  • Additive
  • Carbonates
  • Electrolyte
  • Ionic liquids
  • Lithium battery

ASJC Scopus subject areas

  • Chemistry(all)

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