Study on the Ionic Conductivity of Comb Polymer Electrolytes

Authors

Liming Ding, Dalian Institute of Chemical Physics, Chinese Acadamy of Sciences, Dalian 116012

Corresponding Author

Liming Ding

Abstract

A comb polymer (CP350) with oligo-oxyethylene side chains was prepared from methyl vinyl ether/maleic anhydride copolymer.The ionic conductivity of CP350/LiAsF₆ and CP350/LiAsF₆ complexes was studied as a function of temperature and [Li]/[EO] ratios. A equivalent circuit was given to interpret complex impedance spectra. At 25 ℃, the ionic conductivity maxima of the two systems are 1.38×10^-4, 8.32×10^-5 S/cm respectively. The appearance of the conductivity maxima has been interpreted as being due to the effect of microviscosity on ion transport. lonic conduction displays non-Arrhenius behaviour. The temperature dependence of ionic conductivity was attributed mainly to the temperature dependence of charge carrier hopping, ion pairing and micro-Brown motion of side chains. The larger the (τ_c+τ_a) value the salt has, the higher the conductivity of the electrolyte film is.

Keywords

Solid polymer electrolyte, Complex impedance spectra, Ionic conductivity, lon radius

DOI Link

https://doi.org/10.61558/2993-074X.1339

Publication Date

1996-08-28

Online Available Date

1996-08-28

Revised Date

1996-05-02

Received Date

1996-03-12

Recommended Citation

Liming Ding. Study on the Ionic Conductivity of Comb Polymer Electrolytes[J]. Journal of Electrochemistry, 1996 , 2(3): 299-304.
DOI: 10.61558/2993-074X.1339
Available at: https://jelectrochem.xmu.edu.cn/journal/vol2/iss3/10