Design of superionic polymers - New insights from Walden plot analysis

Yangyang Wang, Fei Fan, Alexander L. Agapov, Xiang Yu, Kunlun Hong, Jimmy Mays, Alexei P. Sokolov

Research output: Contribution to journalArticlepeer-review

56 Scopus citations

Abstract

Using a modified Walden plot analysis, we demonstrate that polyether-based solid electrolytes have intrinsic limitations for ionic transport at ambient and low temperatures, due to strongly coupled segmental and ion dynamics. On the other hand, rigid polymers can exhibit ionic conductivity that is highly decoupled from segmental relaxation, thus providing a significant advantage over traditional polyether electrolytes. Our analysis emphasizes that decoupling of ionic transport from segmental dynamics is the key for macromolecular design of "superionic" polymers.

Original languageEnglish
Pages (from-to)782-784
Number of pages3
JournalSolid State Ionics
Volume262
DOIs
StatePublished - Sep 1 2014

Funding

This research was sponsored by the Laboratory Directed Research and Development Program of Oak Ridge National Laboratory , managed by UT-Battelle, LLC, for the U.S. Department of Energy. The polymer synthesis was conducted at the Center for Nanophase Materials Sciences, which is sponsored at Oak Ridge National Laboratory by the Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy. J.M. and A.P.S. acknowledge the financial support from the Division of Materials Science and Engineering, U.S. Department of Energy, Office of Basic Energy Sciences. F.F. and A.L.A. thank the NSF Polymer Program (DMR-1104824) for funding.

Keywords

  • Decoupling
  • Polymer electrolytes
  • Superionic
  • Walden plot

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