Polymer Composite @ Nano TiO2/LiBF4 as an Electrospun Fiber Nano Composite Electrolyte: Preparation, Characterization and Electrical Properties

As a new trial of overcoming constraints regarding degradation stability, amorphous structure nature, high potential of breakdown and band offsets process ability and reproducibility of polymer composite electrolytes used in energy storage systems such as lithium ion batteries was here reported. In presence of three different polymers, PMMA, PVDF-co-HFP and PEO, with a respectively molar ratio of 1:1:0.5, electrospun fibers nano composites electrolytes containing different concentrations of nano TiO2 filler and lithium tetrafluoro borate salt were successfully synthesized using electrospinning technique. All results of structure characterization confirmed that the sample containing 12 wt.% nano TiO2 filler (NPEC4) has the optimized structure for the electrical properties performance. This sample exhibited low crystallinity, high thermal stability, suitable pore diameter and fiber diameter of its electrospun. The same sample showed high ionic conductivity (s(AC) = 1.08 x 10(-3) O-1 cm(-1)) at room temperature. Electrical properties of this sample, in addition to a comparison with previous studied similar electrolyte systems, exhibited the ability of this electrospun fiber nano composite electrolyte to be used as a promised solid electrolyte for lithium-ion batteries application. All results were collected and discussed.