Decoupling of ionic transport from segmental relaxation in polymer electrolytes

Decoupling of ionic transport from segmental relaxation in polymer electrolytes

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...

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Veröffentlicht in:Physical review letters 2012-02, Vol.108 (8), p.088303-088303, Article 088303
Hauptverfasser: Wang, Yangyang, Agapov, Alexander L, Fan, Fei, Hong, Kunlun, Yu, Xiang, Mays, Jimmy, Sokolov, Alexei P
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container_issue 8
container_start_page 088303
container_title Physical review letters
container_volume 108
creator Wang, Yangyang
Agapov, Alexander L
Fan, Fei
Hong, Kunlun
Yu, Xiang
Mays, Jimmy
Sokolov, Alexei P
description 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.
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title Decoupling of ionic transport from segmental relaxation in polymer electrolytes
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