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Poly(vinylidene fluoride) nanofiber membrane with polypropylene support layer as a lithium-ion battery membrane

Davoud Amini, Erfan Oliaei, Mehdi Rajabi-Hamane, Hossein Mahdavi

Abstract


This work aims at preparation of poly(vinylidene fluoride) (PVdF) nanofiber membranes using electrospinning along with the use of polypropylene (PP) spunbonded non-woven fabric as its support for enhancing mechanical properties. Morphology and size of the membranes are studied by the scanning electron microscopy and optimum diameter of nanofibers are obtained by adjusting of electrospinning control factors. The tensile strength of the membrane increases from 39.67 to 52.75 MPa with the increase of spinning time from 1.5 to 2.0h. The studies of tensile behavior of membranes display that PP spunbonded fabric increases the tensile strength of prepared membranes. Thermal stability of the prepared membranes was determined using the TGA method and the dimensional stability was investigated by the measuring of shrinkage ratio at 105˚C. Shrinkage ratio, electrolyte uptake level and electrical resistance of the prepared membrane indicate its potential for battery separators.


Keywords


lithium-ion battery; membrane; electrospinning; poly(vinylidene fluoride) fibrous separator; polypropylene spunbonded fabric support

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References


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