Abstract
In the present study, poly(ethylene oxide) (PEO) complexed with lithium 2-trifluoromethyl-4,5-dicyanoimidazole (LiTDI) nanocomposite solid polymer electrolyte membranes (NSPEMs) have been prepared by solution cast technique using different weight percent of nano-sized TiO2 ceramic filler. The effect of filler incorporation on the structural, thermal, mechanical and ionic conductivity properties of solid polymer electrolytes have analyzed. X-ray diffraction (XRD) and polarized optical microscopy (POM) results indicated that the crystallinity has been reduced remarkably with the incorporation of TiO2 nanofiller. The thermal stability and mechanical integrity of the nanocomposite polymer electrolyte system increased significantly compared to filler free electrolytes. The maximum ionic conductivity is found to be in the range of 2.11×10−5Scm−1 for 8wt% TiO2 nanofiller in PEO12–LiTDI electrolyte system. These results indicated that the prepared TiO2 based nanocomposite membrane would be a promising alternative separator for rechargeable lithium-ion battery applications.
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