Ionic conductivity in the solid glyme complexes [CH3O(CH2CH2O)(n)CH3]: LiAsF6 (n=3,4)

Chuhong Zhang, David Ainsworth, Yuri G. Andreev, Peter G. Bruce

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)

Abstract

We have shown that two small molecule solid electrolytes, [CH3O(CH2CH2O)(3)CH3]:LiAsF6 and [CH3O(CH2CH2O)(4)CH3]:LiAsF6, differing by only one ethylene oxide unit exhibit markedly different transport numbers, t(+)= 0.8 and 0.1, respectively. Such differences are related, on the one hand, to the presence of tunnels for Li+ migration in the crystal structure of the G3 complex, but not G4, and, on the other hand, to the weaker binding of AsF6- in the structure of G4 than in G3. Learning how to construct solid electrolytes that exhibit high Li+ transport numbers is important in minimizing polarization when such electrolytes are used in all-solid-state cells, such as lithium batteries.

Original languageEnglish
Pages (from-to)8700
Number of pages3
JournalJournal of the American Chemical Society
Volume129
DOIs
Publication statusPublished - 18 Jul 2007

Keywords

  • CRYSTALLINE POLYMER ELECTROLYTES
  • AMORPHOUS CONCENTRATED LIQUID
  • CATION SOLVATE STRUCTURES
  • MODELS

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