Conductivity vs NMR correlation times, and decoupled cation motion in polymer-in-salt electrolytes

Jiang Fan, R. F. Marzke, Charles Angell

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Scopus citations

Abstract

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.

Original languageEnglish (US)
Title of host publicationMaterials Research Society Symposium Proceedings
PublisherPubl by Materials Research Society
Pages87-92
Number of pages6
ISBN (Print)1558991883
StatePublished - Jan 1 1993
EventProceedings of the Second Symposium on Dynamics in Small Confining Systems - Boston, MA, USA
Duration: Nov 30 1992Dec 4 1992

Publication series

NameMaterials Research Society Symposium Proceedings
Volume293
ISSN (Print)0272-9172

Other

OtherProceedings of the Second Symposium on Dynamics in Small Confining Systems
CityBoston, MA, USA
Period11/30/9212/4/92

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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    Fan, J., Marzke, R. F., & Angell, C. (1993). Conductivity vs NMR correlation times, and decoupled cation motion in polymer-in-salt electrolytes. In Materials Research Society Symposium Proceedings (pp. 87-92). (Materials Research Society Symposium Proceedings; Vol. 293). Publ by Materials Research Society.