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He P.,SouthwestUniversity of Science and Technology | Chen B.,SouthwestUniversity of Science and Technology | Wang Y.,SouthwestUniversity of Science and Technology | Xie Z.,SouthwestUniversity of Science and Technology | Dong F.,SouthwestUniversity of Science and Technology
Electrochimica Acta | Year: 2013

Organophilic vermiculite was prepared by ionic exchange reaction between vermiculite andcetyltrimethylammonium bromide, and it was then used as filler to prepare a series of composite gelpolymer electrolytes containing poly(methyl methacrylate) and room temperature ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate. Surface morphology and structural nature of the compositeelectrolytes were examined by scanning electron microscopy and Fourier transform infrared spec-troscopy, respectively. X-ray diffraction analysis confirmed that organophilic vermiculite decreased thecrystallinity of polymer and formed intercalated polymer/layered silicate composite. On the other hand,the dispersion of organophilic vermiculite increased the thermal property of polymer electrolytes. Furthermore, the ionic conductivity and electrochemical window of composite gel polymer electrolytereached up to the value of 4.01 × 10-3S cm-1and 3.8 V at the adding content of 8 wt.% organophilicvermiculite, respectively.© 2013 Elsevier Ltd.

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