N-Alkyl-N-methylpyrrolidinium Difluoro(oxalato)borate Ionic Liquids: Physical/Electrochemical Properties and Al Corrosion

Abstract

The synthesis and physical properties of difluoro(oxalato)borate (DFOB-)-based ionic liquids (ILs) are reported with N-alkyl-N-methylpyrrolidinium (PY1R+) cations with butyl, pentyl and hexyl alkyl chains. The PY14DFOB and PY16DFOB salts have a melting point (Tm) of -5 deg C and 31 deg C, respectively, whereas the PY15DFOB salt does not crystallize. Instead, this salt has a glass transition temperature (Tg) of -74 deg C. Electrolytes composed of these ILs are noncorrosive towards Al when mixed with LiTFSI and LiFSI, as well as with LiPF6 or LiDFOB. The exceptional oxidative stability of these ILs suggests that they may be suitable for battery electrolyte applications.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2013
Accession Number
ADA582109

Entities

People

  • Dennis W. Mcowen
  • Eric T. Fox
  • James S. Dickman
  • Joshua L. Allen
  • Samuel A. Delp
  • Sang-Don Han
  • T. Richard Jow
  • Wesley A. Henderson
  • Zin-bin Zhou

Organizations

  • North Carolina State University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Carbonate Esters
  • Chemical Synthesis
  • Chemistry
  • Corrosion
  • Glass Transition Temperature
  • Ionic Liquids
  • Liquids
  • Lithium Ion Batteries
  • Materials
  • Measurement
  • Organic Chemistry
  • Phase Transformations
  • Photoelectrochemical Cells
  • Physical Properties
  • Thermal Stability
  • Transition Temperature
  • Transitions

Readers

  • Analytical Chemistry
  • Electrochemical Engineering/ Fuel Cell Technologies
  • Materials Science and Engineering.