Publication Type
Journal
Journal Name
Physical Review Letters
Publication Date
Volume
108
Issue
8
Abstract
We present detailed studies of the relationship between ionic conductivity and segmental relaxation in
polymer electrolytes. The analysis shows that the ionic conductivity can be decoupled from segmental
dynamics and the strength of the decoupling correlates with the fragility but not with the glass transition
temperature. These results call for a revision of the current picture of ionic transport in polymer
electrolytes. We relate the observed decoupling phenomenon to frustration in packing of rigid polymers,
where the loose local structure is also responsible for the increase in their fragility.
