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Title: Decoupling Ionic Conductivity from Structural Relaxation: A Way to Solid Polymer Electrolytes?

Abstract

Using broadband dielectric spectroscopy, we studied the temperature dependence of ionic conductivity and structural relaxation in a number of polymers. We demonstrate that temperature dependence of ionic conductivity can be decoupled from structural relaxation in a material specific way. We show that the strength of the decoupling correlates with the steepness of the temperature dependence of structural relaxation in the polymer, i.e., with its fragility. We ascribe the observed result to stronger frustration in chain packing characteristic for more fragile polymers. We speculate that employment of more fragile polymers might lead to design of polymers with higher ionic conductivity.

Authors:
 [1];  [1]
  1. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1020803
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Macromolecules; Journal Volume: 44; Journal Issue: 11
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; DECOUPLING; DESIGN; DIELECTRIC MATERIALS; ELECTROLYTES; EMPLOYMENT; IONIC CONDUCTIVITY; POLYMERS; RELAXATION; SPECTROSCOPY; TEMPERATURE DEPENDENCE

Citation Formats

Agapov, Alexander L, and Sokolov, Alexei P. Decoupling Ionic Conductivity from Structural Relaxation: A Way to Solid Polymer Electrolytes?. United States: N. p., 2011. Web. doi:10.1021/ma2001096.
Agapov, Alexander L, & Sokolov, Alexei P. Decoupling Ionic Conductivity from Structural Relaxation: A Way to Solid Polymer Electrolytes?. United States. doi:10.1021/ma2001096.
Agapov, Alexander L, and Sokolov, Alexei P. Sat . "Decoupling Ionic Conductivity from Structural Relaxation: A Way to Solid Polymer Electrolytes?". United States. doi:10.1021/ma2001096.
@article{osti_1020803,
title = {Decoupling Ionic Conductivity from Structural Relaxation: A Way to Solid Polymer Electrolytes?},
author = {Agapov, Alexander L and Sokolov, Alexei P},
abstractNote = {Using broadband dielectric spectroscopy, we studied the temperature dependence of ionic conductivity and structural relaxation in a number of polymers. We demonstrate that temperature dependence of ionic conductivity can be decoupled from structural relaxation in a material specific way. We show that the strength of the decoupling correlates with the steepness of the temperature dependence of structural relaxation in the polymer, i.e., with its fragility. We ascribe the observed result to stronger frustration in chain packing characteristic for more fragile polymers. We speculate that employment of more fragile polymers might lead to design of polymers with higher ionic conductivity.},
doi = {10.1021/ma2001096},
journal = {Macromolecules},
number = 11,
volume = 44,
place = {United States},
year = {Sat Jan 01 00:00:00 EST 2011},
month = {Sat Jan 01 00:00:00 EST 2011}
}