Ionic conductivity of polymer-ceramic composites

The ionic conductivity data in the PEO:LiBF4-MgO and PEO:LiBF4-BaTiO3 composite electrolyte systems were analysed. The polymer and ceramic phases in the systems interact to provide a stable, amorphous phase. The ceramic phase suppresses crystallisation of and interacts with the polymer phase. The na...

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Bibliographic Details
Published in:Journal of the Electrochemical Society 2001-01, Vol.148 (10), p.A1191-A1195
Main Authors: KUMAR, Binod, RODRIGUES, Stanley J, SCANLON, Lawrence G
Format: Article
Language:English
Subjects:
Applied sciences
Direct energy conversion and energy accumulation
Electrical engineering. Electrical power engineering
Electrical power engineering
Electrochemical conversion: primary and secondary batteries, fuel cells
Exact sciences and technology
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Summary:The ionic conductivity data in the PEO:LiBF4-MgO and PEO:LiBF4-BaTiO3 composite electrolyte systems were analysed. The polymer and ceramic phases in the systems interact to provide a stable, amorphous phase. The ceramic phase suppresses crystallisation of and interacts with the polymer phase. The nature of the interaction is believed to be dipole-dipole and driven by a dielectric constant gradient. The nanosize ceramic powder provides higher conductivity values because of an enhanced interaction. At low temperatures (about 20 C) the dipole-dipole interaction is favoured, whereas at high temperatures (about 100 C) a reverse trend is observed. A very high dielectric constant material such as BaTiO3 provides little additional benefit. 11 refs.
ISSN:0013-4651
1945-7111
DOI:10.1149/1.1403729