New single ion conductors ("polyBOP" and analogs) for rechargeable lithium batteries

Xiao Guang Sun, Charles Angell

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Phosphorus-containing single ion conducting polyanionic electrolytes have been synthesized from PCl 5, oxalic acid (or catechol) and polyethylene glycols (or polypropylene glycols), using a stepwise procedure. The highest ambient conductivity of 10 -5.8 S cm -1 is obtained for the polymer synthesized from oxalic acid and PEG600 (LiBOPEG 600). While the ionic conductivity of the polymer formed from chloro bis(oxalato)borate (BOP) and PEG400 is nearly one order of magnitude higher than that of the polymer formed from BOP and PPG425, the ionic conductivity of the polymer formed from oxalic acid, PCl 5 and PEG600 is only slightly higher than that of the polymer formed from catechol, PCl 5 and PEG600. All the temperature dependence of the ionic conductivities shows curved Arrhenius plots, suggesting that the ion transport is closely associated with segmental motion of the polymer chain. Both the free-volume theory based William-Landel-Ferry (WLF) equation and the well-known Vogel-Tammann-Fulcher (VTF) equation are found to be valid for describing the conductivity data within the temperature range investigated.

Original languageEnglish (US)
Pages (from-to)743-746
Number of pages4
JournalSolid State Ionics
Volume175
Issue number1-4
DOIs
StatePublished - Nov 30 2004

Fingerprint

Lithium batteries
lithium batteries
Polymers
conductors
Ions
analogs
Oxalic Acid
oxalic acid
Oxalic acid
polymers
Ionic conductivity
ion currents
ions
glycols
Arrhenius plots
conductivity
Borates
Free volume
Glycols
borates

Keywords

  • Conductivity
  • Lithium batteries
  • Single ion conductors
  • VTF
  • WLF

ASJC Scopus subject areas

  • Electrochemistry
  • Physical and Theoretical Chemistry
  • Energy Engineering and Power Technology
  • Materials Chemistry
  • Condensed Matter Physics

Cite this

New single ion conductors ("polyBOP" and analogs) for rechargeable lithium batteries. / Sun, Xiao Guang; Angell, Charles.

In: Solid State Ionics, Vol. 175, No. 1-4, 30.11.2004, p. 743-746.

Research output: Contribution to journalArticle

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