Electrospun nanocomposite fibrous polymer electrolyte for secondary lithium battery applications

摘要

Hybrid nanocomposite [poly(vinylidene fluoride -co- hexafluoropropylene) (PVdF-co-HFP)/magnesium aluminate (MgAl_2O_4)] fibrous polymer membranes were prepared by electro spinning method. The prepared pure and nanocomposite fibrous polymer electrolyte membranes were soaked into the liquid electrolyte 1M LiPF_6 in EC: DEC (1:1,v/v). XRD and SEM are used to study the structural and morphological studies of nanocomposite electrospun fibrous polymer membranes. The nanocomposite fibrous polymer electrolyte membrane with 5 wt.% of MgAl_2O_4 exhibits high ionic conductivity of 2.80 × 10~(-3) S/cm at room temperature. The charge-discharge capacity of Li/LiCoO_2 coin cells composed of the newly prepared nanocomposite [(16 wt.%) PVdF-co-HFP+(5 wt.%) MgAl_2O_4] fibrous polymer electrolyte membrane was also studied and compared with commercial Celgard separator.