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Influence of DC electric field on both crystalline structure and conductivity of poly(ethylene oxide)10:LiClO4 electrolyte

  1. Jiliang Wang1,2,*,
  2. Jingxin Lei2

Article first published online: 5 FEB 2012

DOI: 10.1002/polb.23047

Issue

Journal of Polymer Science Part B: Polymer Physics

Journal of Polymer Science Part B: Polymer Physics

Volume 50, Issue 9, pages 656–667, 1 May 2012

Additional Information

How to Cite

Wang, J. and Lei, J. (2012), Influence of DC electric field on both crystalline structure and conductivity of poly(ethylene oxide)10:LiClO4 electrolyte. J. Polym. Sci. B Polym. Phys., 50: 656–667. doi: 10.1002/polb.23047

Author Information

  1. 1

    School of Chemical Science and Technology, Yunnan University, Kunming 650091, China

  2. 2

    State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China

*School of Chemical Science and Technology, Yunnan University, Kunming 650091, China

Publication History

  1. Issue published online: 26 MAR 2012
  2. Article first published online: 5 FEB 2012
  3. Manuscript Accepted: 6 JAN 2012
  4. Manuscript Revised: 20 DEC 2011
  5. Manuscript Received: 20 SEP 2011

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Keywords:

  • crystalline structure;
  • dynamic;
  • differential scanning calorimetry (DSC);
  • external electric field;
  • ionic conductivity;
  • lamellar;
  • poly(ethylene oxide)

Abstract

The dynamic ionic conductivity and polarizing morphology of poly(ethylene oxide)10:LiClO4 (PEO10:LiClO4) electrolyte membranes under different direct current electric fields (EFs) were simultaneously investigated. PEO molecular chains were found to rearrange during the migration of charge carriers, and the rearrangement of PEO molecular chains dramatically affected the conductivity of the electrolyte membrane. No noticeable differences of conductivity and polarizing morphology between the heating and cooling process were observed when the EF was absent. However, the conductivity of the membrane was remarkably enhanced after applying an EF and after carrying out a heating–cooling loop. Differential scanning calorimetry and wide-angle X-ray diffraction of the sample with different treatments of both EFs and heating–cooling loops showed that the conductivity enhancement or reduction after loading special EFs and heating–cooling loops were attributed to the change of both the crystallite size of certain diffraction planes and the thickness of PEO lamellae. © 2012 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys, 2012

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