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Imidazolium-organic solvent–alkali metal salt mixtures as nonflammable electrolytes incorporated into PVDF–PEG polymer electrolyte

Authors

  • Yun-Pu Wang,

    1. Institute of Polymer, Key Laboratory of Polymer Materials of Gansu Province, Northwest Normal University, Lanzhou 730070, China
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  • Xiang-Hu Gao,

    Corresponding author
    1. Institute of Polymer, Key Laboratory of Polymer Materials of Gansu Province, Northwest Normal University, Lanzhou 730070, China
    • Institute of Polymer, Key Laboratory of Polymer Materials of Gansu Province, Northwest Normal University, Lanzhou 730070, China
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  • Jiu-Cun Chen,

    1. Institute of Polymer, Key Laboratory of Polymer Materials of Gansu Province, Northwest Normal University, Lanzhou 730070, China
    2. Department of Chemistry and Chemical Engineering, Ankang University, Ankang 725000, China
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  • Zhi-Wen Li,

    1. Institute of Polymer, Key Laboratory of Polymer Materials of Gansu Province, Northwest Normal University, Lanzhou 730070, China
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  • Cheng-Lin Li,

    1. Institute of Polymer, Key Laboratory of Polymer Materials of Gansu Province, Northwest Normal University, Lanzhou 730070, China
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  • Shou-Cun Zhang

    1. Institute of Polymer, Key Laboratory of Polymer Materials of Gansu Province, Northwest Normal University, Lanzhou 730070, China
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Abstract

A mixture of flammable organic solvent, alkali metal salt, and nonflammable room temperature ionic liquid has been used as a new type of electrolyte. A novel microporous polymer electrolyte based on poly(vinylidene fluoride), i.e., PVDF, and poly(ethylene glycol), i.e., PEG, was prepared by a simple phase-inversion technique. The mixed electrolyte was observed to be nonflammable at ionic liquid contents of 60 vol % or greater. The viscosity (range, 0.98–30.5 mPa s) and conductivity (range, 9.9 to 22.25 mS cm−1) of the mixed electrolyte were discussed. The porosity, solution uptake, and conductivity mechanism of polymer membranes also were discussed. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009

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