Preparation of Nanosheet Orientation Structure Composite Dielectric Materials with Electrospinning Technology
Metallized film capacitors have attracted much attention in the new energy industry due to their ultra-high power density.In order to enhance the energy storage density of film capacitors,highly insulating boron nitride nanoplates(BNNS)are introduced into the polyvithin-filmnylidene fluoride(PVDF)polymer matrix to prepare high-energy-storage composite dielectric materials.Electrospinning technology is used to achieve a uniformly oriented distribution of BNNS.The results show that the highly insulating nanosheets with uniform oriented distribution can inhibit the carrier migration and enhance the breakdown strength of the composites.Combined with the phase-field simulation analysis,it is known that the uniformly oriented BNNS can adjust the external electric field distribution and block the breakdown more effectively.Ultimately,an energy storage density of up to 10.5 J/cm3 is achieved at the electric field intensity of 396 MV/m.
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