Journal
IONICS
Volume 19, Issue 11, Pages 1587-1593Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11581-013-0905-2
Keywords
Polymer electrolyte; Poly(vinylidene fluoride); Solvent evaporation temperature; Ionic liquid
Funding
- National Natural Science Foundation of China [20973014]
- Beijing Natural Science Foundation [2132031]
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Poly(vinylidene fluoride)-based polymer electrolytes using ionic liquid 1-butyl-3-methylimidazolium bis(trifluoromethylsufonyl)imide as the plasticizer were prepared by solution casting method. The effects of the solvent evaporation temperature (SET) and ionic liquid content (ILC) on the properties and structures of the polymer electrolytes were investigated by characterization of scanning electron microscope (SEM), X-ray diffraction (XRD), thermogravimetric analysis (TGA), differential scanning calorimetry, as well as mechanical and ionic conductivity test. It was confirmed that both SET and ILC had significant influence on the morphology, degree of crystallinity, mechanical properties, and ionic conductivity of the prepared polymer electrolytes. With ILC of 40 %, an excellent polymer electrolyte can be obtained at SET of 60 A degrees C, which exhibited ionic conductivity up to ca. 10(-4) S/cm at room temperature, accompanied by excellent tensile strength of 22.8 MPa and elongation at break of 540 %.
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