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Title: Decoupling of ion conductivity from segmental dynamics in oligomeric ethylene oxide functionalized oxanorbornene dicarboximide homopolymers

Abstract

Here, in order to design more effective solid polymer electrolytes, it is important to decouple ion conductivityfrom polymer segmental motion. To that end, novel polymers based on oxanorbornene dicarboximidemonomers with varying lengths of oligomeric ethylene oxide side chains have been synthesized usingring opening metathesis polymerization. These unique polymers have a fairly rigid and bulky backboneand were used to investigate the decoupling of ion motion from polymer segmental dynamics. Ionconductivity was measured using broadband dielectric spectroscopy for varying levels of added lithiumsalt. The conductivity data demonstrate six to seven orders of separation in timescale of ion conductivityfrom polymer segmental motion for polymers with shorter ethylene oxide side chains. However,commensurate changes in the glass transition temperatures T g reduce the effect of decoupling in ionconductivity and lead to lower conductivity at ambient conditions. These results suggest that both anincrease in decoupling and a reduction in T g might be required to develop solid polymer electrolytes withhigh ion conductivity at room temperature.

Authors:
 [1];  [1];  [1]; ORCiD logo [2];  [3]; ORCiD logo [4]; ORCiD logo [1]
  1. Pacific Lutheran Univ., Tacoma, WA (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Univ. of Tennessee, Knoxville, TN (United States)
  4. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1435316
Alternate Identifier(s):
OSTI ID: 1396507
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Polymer
Additional Journal Information:
Journal Volume: 116; Journal Issue: C; Journal ID: ISSN 0032-3861
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Solid polymer electrolytes; Ionic conductivity; Decoupling of segmental dynamics

Citation Formats

Adams, Marisa, Richmond, Victoria, Smith, Douglas, Wang, Yangyang, Fan, Fei, Sokolov, Alexei P., and Waldow, Dean A. Decoupling of ion conductivity from segmental dynamics in oligomeric ethylene oxide functionalized oxanorbornene dicarboximide homopolymers. United States: N. p., 2017. Web. doi:10.1016/j.polymer.2017.03.054.
Adams, Marisa, Richmond, Victoria, Smith, Douglas, Wang, Yangyang, Fan, Fei, Sokolov, Alexei P., & Waldow, Dean A. Decoupling of ion conductivity from segmental dynamics in oligomeric ethylene oxide functionalized oxanorbornene dicarboximide homopolymers. United States. doi:10.1016/j.polymer.2017.03.054.
Adams, Marisa, Richmond, Victoria, Smith, Douglas, Wang, Yangyang, Fan, Fei, Sokolov, Alexei P., and Waldow, Dean A. Fri . "Decoupling of ion conductivity from segmental dynamics in oligomeric ethylene oxide functionalized oxanorbornene dicarboximide homopolymers". United States. doi:10.1016/j.polymer.2017.03.054. https://www.osti.gov/servlets/purl/1435316.
@article{osti_1435316,
title = {Decoupling of ion conductivity from segmental dynamics in oligomeric ethylene oxide functionalized oxanorbornene dicarboximide homopolymers},
author = {Adams, Marisa and Richmond, Victoria and Smith, Douglas and Wang, Yangyang and Fan, Fei and Sokolov, Alexei P. and Waldow, Dean A.},
abstractNote = {Here, in order to design more effective solid polymer electrolytes, it is important to decouple ion conductivityfrom polymer segmental motion. To that end, novel polymers based on oxanorbornene dicarboximidemonomers with varying lengths of oligomeric ethylene oxide side chains have been synthesized usingring opening metathesis polymerization. These unique polymers have a fairly rigid and bulky backboneand were used to investigate the decoupling of ion motion from polymer segmental dynamics. Ionconductivity was measured using broadband dielectric spectroscopy for varying levels of added lithiumsalt. The conductivity data demonstrate six to seven orders of separation in timescale of ion conductivityfrom polymer segmental motion for polymers with shorter ethylene oxide side chains. However,commensurate changes in the glass transition temperatures Tg reduce the effect of decoupling in ionconductivity and lead to lower conductivity at ambient conditions. These results suggest that both anincrease in decoupling and a reduction in Tg might be required to develop solid polymer electrolytes withhigh ion conductivity at room temperature.},
doi = {10.1016/j.polymer.2017.03.054},
journal = {Polymer},
number = C,
volume = 116,
place = {United States},
year = {Fri Mar 24 00:00:00 EDT 2017},
month = {Fri Mar 24 00:00:00 EDT 2017}
}

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