TY  - JOUR
A1  - Sangoro, Joshia R.
A1  - Iacob, C.
A1  - Agapov, A. L.
A1  - Wang, Yangyang
A1  - Berdzinski, Stefan
A1  - Rexhausen, Hans
A1  - Strehmel, Veronika
A1  - Friedrich, C.
A1  - Sokolov, A. P.
A1  - Kremer, F.
T1  - Decoupling of ionic conductivity from structural dynamics in polymerized ionic liquids
JF  - Soft matter
N2  - Charge transport and structural dynamics in low molecular weight and polymerized 1-vinyl-3-pentylimidazolium bis(trifluoromethylsulfonyl) imide ionic liquids (ILs) are investigated by a combination of broadband dielectric spectroscopy, dynamic mechanical spectroscopy and differential scanning calorimetry. While the dc conductivity and fluidity exhibit practically identical temperature dependence for the non-polymerized IL, a significant decoupling of ionic conduction from structural dynamics is observed for the polymerized IL. In addition, the dc conductivity of the polymerized IL exceeds that of its molecular counterpart by four orders of magnitude at their respective calorimetric glass transition temperatures. This is attributed to the unusually high mobility of the anions especially at lower temperatures when the structural dynamics is significantly slowed down. A simple physical explanation of the possible origin of the remarkable decoupling of ionic conductivity from structural dynamics is proposed.
Y1  - 2014
U6  - https://doi.org/10.1039/c3sm53202j
SN  - 1744-683X
SN  - 1744-6848
VL  - 10
IS  - 20
SP  - 3536
EP  - 3540
PB  - Royal Society of Chemistry
CY  - Cambridge
ER  -