Journal of Polymers and the Environment

, Volume 27, Issue 11, pp 2369–2379 | Cite as

Conductivity of PEO/PLA Doped Liquid Crystal Ionomer Solid Polymer Electrolyte in Mesomorphic Range

  • Meng Zhang
  • Ai-ling ZhangEmail author
  • Qiu Li
  • Fang-fang Li
  • Song Wang
  • San-xi Li
Original paper


A novel polyethylene oxide (PEO)/polylactic acid (PLA) solid polymer electrolyte (SPE) doped with Liquid crystal ionomer (LCI) was prepared by automatic scraping membrane technology and the liquid crystal property of LCI was proposed as an effective strategy to improve the conductivity. The highest conductivity of the SPE with 0.5 wt% LCI achieve a value of 2.19 × 10−4 S/cm at 17 °C which is approximately four orders of magnitude higher than that of the original PEO solid polymer electrolyte, conductivity at room temperature is 10−7–10−8 S/cm. This is because the crystallinity is reduced by 25.3% compared to the pure PEO host. Differential Scanning Calorimetry (DSC) and polarizing microscope (POM) characterize the structure and properties of LCI. Electrochemical Impedance Spectroscopy (EIS) shows that the conductivity of the polymer electrolyte with 0.5 wt% LCI increased abruptly at 35 °C as the temperature is higher than Tg of LCI, reaching 6.37 × 10−4 S/cm which is 191% higher than that at 17 °C. There ionic conductivity has been improved extremely by continuous channel for efficient ion transportation, especially at the microtherm. And this change is greater at the elevated temperature regions, in line with the VTF equation. In summary, LCI’s liquid crystal performance can be used as an effective strategy to improve the low temperature conductivity of SPE.


Solid polymer electrolyte Liquid crystal ionomer Sulfonate ion PEO/PLA blends Mesomorphic range Solubilizers 



Liaoning Provincial Key Laboratory for Polymer Catalytic Synthesis Technology (Document No.36 by DST, Liaoning Province [2010].); Advanced polymer materials engineering laboratory in liaoning province (2012.5). Additionally, the authors thank the School of Material Science and Engineering of Shenyang University of Technology for SEM measurement.


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • Meng Zhang
    • 1
  • Ai-ling Zhang
    • 1
    Email author
  • Qiu Li
    • 1
  • Fang-fang Li
    • 1
  • Song Wang
    • 1
  • San-xi Li
    • 1
  1. 1.College of ScienceShenyang University of TechnologyLiaoningChina

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