Larger cations can move faster in solid polymer electrolytes

Hiroyuki Ohno*, Norihisa Kobayashi, Shinji Takeoka, Hajime Ishizaka, Eishun Tsuchida

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

50 Citations (Scopus)


Poly[(ω-carboxy)-oligo(oxyethylene)methacrylate] alkali metal salts (P(CMEnM)s) are synthesized as solid polymer electrolytes which can transfer only cations. The conductivity of a series of alkali metal ions such as Li+, Na+, K+, Rb+, and Cs+ is measured, and the results are summarized with the reduced temperature (T-Tg:Tg=glass transition temperature) to neutralize the effect of segmental motion on the relative conductivity. They show a linear relation between the logarithm of conductivity at T-Tg=60°C and the logarithm of radius of the carrier cations. The ion-dipole interaction is suggested to be the most effective factor to control the mobility in the solid polymer electrolytes. Cations having larger ionic radius such as Rb+ or Cs+ are suggested to have weaker interaction force with ether oxygens, reflecting the faster ion exchange between possible adjacent sites in the polymer matrix.

Original languageEnglish
Pages (from-to)655-658
Number of pages4
JournalSolid State Ionics
Issue numberPART 2
Publication statusPublished - 1990 Aug

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics


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