Synthesis and properties of acyclic ammonium-based ionic liquids with allyl substituents as electrolytes

Molecules. 2009 May 15;14(5):1840-51. doi: 10.3390/molecules14051840.

Abstract

Several new acyclic ammonium-TFSI ionic liquids with an allyl substituent(s) were synthesized and their physicochemical and electrochemical properties were characterized. [AAMM]Am-TFSI (3) with two allyl groups showed the widest electrochemical stability window (5.9 V) among the ammonium-based ILs reported to date because of the increment of both the anodic and cathodic limits. The charge-discharge performance of a LiCoO(2)-based half-cell containing [AAMM]Am-TFSI as an electrolyte was better in cycleability (the capacity retention ratio: 99% after 20 cycles) than that of the cell with the corresponding partially saturated analogue, [AMMP]Am-TFSI (2) (the capacity retention ratio: 92% after 20 cycles).

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Electrochemistry
  • Electrolytes*
  • Ionic Liquids* / chemical synthesis
  • Ionic Liquids* / chemistry
  • Molecular Structure
  • Organic Chemicals* / chemical synthesis
  • Organic Chemicals* / chemistry
  • Quaternary Ammonium Compounds* / chemical synthesis
  • Quaternary Ammonium Compounds* / chemistry
  • Temperature

Substances

  • Electrolytes
  • Ionic Liquids
  • Organic Chemicals
  • Quaternary Ammonium Compounds