TY - GEN
T1 - Conductivity vs NMR correlation times, and decoupled cation motion in polymer-in-salt electrolytes
AU - Fan, Jiang
AU - Marzke, R. F.
AU - Angell, Charles
PY - 1993/1/1
Y1 - 1993/1/1
N2 - We report 7Li spin lattice relaxation times at 12.82 MHz over a range of temperatures for liquid electrolytes of various salt:polymer ratios, and compare the NMR correlation time obtained at the temperature of the T1 minimum with the conductivity relaxation time at the same temperature. We find that at low salt contents the two relaxation times have the same value, but beyond the `salt-in-polymer to polymer-in-salt transition' zone at the Tg maximum, the two times increasingly separate. This is taken as evidence for the onset of cation-matrix mobility decoupling, which maximizes at the pure salt extreme.
AB - We report 7Li spin lattice relaxation times at 12.82 MHz over a range of temperatures for liquid electrolytes of various salt:polymer ratios, and compare the NMR correlation time obtained at the temperature of the T1 minimum with the conductivity relaxation time at the same temperature. We find that at low salt contents the two relaxation times have the same value, but beyond the `salt-in-polymer to polymer-in-salt transition' zone at the Tg maximum, the two times increasingly separate. This is taken as evidence for the onset of cation-matrix mobility decoupling, which maximizes at the pure salt extreme.
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M3 - Conference contribution
AN - SCOPUS:0027274336
SN - 1558991883
T3 - Materials Research Society Symposium Proceedings
SP - 87
EP - 92
BT - Materials Research Society Symposium Proceedings
PB - Publ by Materials Research Society
T2 - Proceedings of the Second Symposium on Dynamics in Small Confining Systems
Y2 - 30 November 1992 through 4 December 1992
ER -