Li-ion conduction on nanofiller incorporated PVdF-co-HFP based composite polymer blend electrolytes for flexible battery applications

摘要

Composite polymer electrolytes (CPE) composed of Poly (vinyl acetate) (PVAc), poly (vinylidenefluoride-co-hexafluoropropylene) (PVdF-co-HFP), barium titanate (BaTiO _3) nanofiller, lithium tetrafluroborate (LiBF _4), ethylene carbonate (EC) and propylene carbonate (PC) were prepared using simple solution casting method. The BaTiO _3 nanofillers were homogeneously dispersed in the polymer electrolyte matrix and exhibited excellent interconnection with PVAc/PVdF-co-HFP/EC/PC/LiBF _4 polymer electrolyte. The addition of BaTiO _3 nanofillers improved the ionic conductivity of the polymer electrolytes to some extent when the content of the BaTiO _3 is 8 wt.%. The addition of BaTiO _3 also enhanced the thermal stability of the electrolyte. The structural and complex formations of the composite electrolyte membranes were confirmed by X-ray diffraction and FTIR analysis, respectively. Surface morphology of the samples was depicted using scanning electron microscope and atomic force microscope studies.