ION-MATRIX COUPLING IN POLYMER ELECTROLYTES FROM RELAXATION TIME STUDIES.

L. M. Torell, Charles Angell

Research output: Contribution to journalArticle

59 Citations (Scopus)

Abstract

The authors review the effects of temperature on conductance and viscosity in the liquid state of vitreous ionic conductors and show how differences may be best understood by comparison of relaxation times for electrical and mechanical stresses acting on liquid or glassy states of the material. This leads to the definition of a conductivity/viscosity mode decoupling index, useful as a figure of merit for the solid electrolyte. In applying the same approach to polymer electrolyte systems, a problem is encountered due to the molecular weight dependence of the viscosity. This is resolved by deriving a 'monomer' shear relaxation time for the polymer electrolyte solution and showing that this quantity corresponds closely with the 'local' mechanical relaxation time obtained from light scattering studies (which is a molecular weight independent quantity for pure polypropylene oxide and other polymers of low T//g).

Original languageEnglish (US)
Pages (from-to)173-179
Number of pages7
JournalBritish Polymer Journal
Volume20
Issue number3
StatePublished - 1987
Externally publishedYes

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Time and motion study
Relaxation time
Electrolytes
Polymers
Viscosity
Ions
Molecular weight
Anelastic relaxation
Polypropylene oxides
Solid electrolytes
Liquids
Light scattering
Monomers
Temperature

ASJC Scopus subject areas

  • Engineering(all)

Cite this

ION-MATRIX COUPLING IN POLYMER ELECTROLYTES FROM RELAXATION TIME STUDIES. / Torell, L. M.; Angell, Charles.

In: British Polymer Journal, Vol. 20, No. 3, 1987, p. 173-179.

Research output: Contribution to journalArticle

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