Structure and conductivity of small-molecule electrolytes [CH3O(CH2CH2O)(n)CH3]: LiAsF6 (n=8-12)

Chuhong Zhang, Scott Joseph Lilley, David Ainsworth, Edward Staunton, Yuri G. Andreev, Alexandra M. Z. Slawin, Peter G. Bruce

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

The crystal structures of [CH3O(CH2CH2O)(n)CH3]:LiAsF6 (n = 8-12) are reported. Each glyme forms a structurally unique complex with LiAsF6. In all glymes Li+ ions are six coordinated when only ether oxygens are involved in coordination. The coordination number is reduced to five when a fluorine from the AsF6- anion is involved in coordination. The absence of convenient pathways for Li+ ions in the structures account for low lithium transport numbers (t(+) < 0.3) in the reported complexes, while greater distances between neighboring anions explain lower conductivities, compared with complexes prepared with lower glymes (n = 3, 4).

Original languageEnglish
Pages (from-to)4039-4044
Number of pages6
JournalChemistry of Materials
Volume20
DOIs
Publication statusPublished - 24 Jun 2008

Keywords

  • CRYSTALLINE POLYMER ELECTROLYTES
  • AMORPHOUS CONCENTRATED LIQUID
  • CATION SOLVATE STRUCTURES
  • IONIC-CONDUCTIVITY
  • PEO6-LIXF6
  • COMPLEXES
  • MODELS
  • SB

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