Effect of salt concentration on the conductivity of PEO-based composite polymeric electrolytes

Władysław Wieczorek , Dorota Raducha , Aldona Zalewska , James R. Stevens

Abstract

The effect of salt concentration on the molal conductivity of various composite electrolytes was studied. Conductivity enhancement is achieved for composite electrolytes over the basic poly(ethylene oxide)?LiClO4 system in the salt concentration range where the filler concentration corresponds to that of LiClO4. On the basis of impedance spectroscopy, DSC, and FT-IR studies, it is concluded that changes in the conductivity result from acid?base type interactions involving polyether oxygens, filler acid or base centers, and alkali metal cations. The effect of a filler is to change the fraction of available oxygen sites which in turn results in changes in the formation of ionic aggregates. The region in which the enhancement of ionic conductivity is observed corresponds to a decrease in the fraction of contact-ion pairs and higher aggregates; this is due to the location of filler molecules in the vicinity of the coordination sphere of Li+ cations.
Author Władysław Wieczorek KChNTCS
Władysław Wieczorek,,
- Chair Of Inorganic Chemistry And Solid State Technology
, Dorota Raducha
Dorota Raducha,,
-
, Aldona Zalewska KChNTCS
Aldona Zalewska,,
- Chair Of Inorganic Chemistry And Solid State Technology
, James R. Stevens
James R. Stevens,,
-
Journal seriesJournal of Physical Chemistry B, ISSN 1520-6106
Issue year1998
Vol102
No44
Pages8725-8731
DOIDOI:10.1021/jp982403f
URL http://dx.doi.org/10.1021/jp982403f
Languageen angielski
File
JoPCh_1998.pdf 82.33 KB
Score (nominal)35
Publication indicators WoS Impact Factor: 2006 = 4.115 (2) - 2007=4.475 (5)
Citation count*163 (2015-06-03)
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