Decoupling Ionic Conductivity from Structural Relaxation: A Way to Solid Polymer Electrolytes?
- ORNL
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.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- DE-AC05-00OR22725
- OSTI ID:
- 1020803
- Journal Information:
- Macromolecules, Vol. 44, Issue 11; ISSN 0024--9297
- Country of Publication:
- United States
- Language:
- English
Similar Records
Decoupling of Ionic Trasport from Segmental Relaxation in Polymer Electrolytes
Effect of Polymer Topology on Microstructure, Segmental Dynamics, and Ionic Conductivity in PEO/PMMA-Based Solid Polymer Electrolytes
Ion Conduction in Polymerized Ionic Liquids with Different Pendant Groups
Journal Article
·
Sun Jan 01 00:00:00 EST 2012
· Physical Review Letters
·
OSTI ID:1020803
+4 more
Effect of Polymer Topology on Microstructure, Segmental Dynamics, and Ionic Conductivity in PEO/PMMA-Based Solid Polymer Electrolytes
Journal Article
·
Thu Dec 23 00:00:00 EST 2021
· ACS Applied Polymer Materials
·
OSTI ID:1020803
+5 more
Ion Conduction in Polymerized Ionic Liquids with Different Pendant Groups
Journal Article
·
Fri Jul 17 00:00:00 EDT 2015
· Macromolecules
·
OSTI ID:1020803
+3 more