Polymer Nanocomposites with High Energy Density and Breakdown Strength utilizing Oriented BNNS

Dielectric capacitors are commonly used in in high-power energy storage and pulse power systems. Low energy storage density is currently the bottleneck restricting the development of dielectric capacitors. The dielectric properties, breakdown strength and energy storage performance of oriented P(VDF-HFP)/BNNS nanocomposites are studied. It has been found that the dielectric properties of the oriented P(VDF-HFP)/BNNS nanocomposite have been significantly improved, the breakdown strength can reach 650 MV/m, and the discharged energy density of 16.8 J/cm
³
is finally obtained, which is 2.02 times of P(VDF-HFP). Low loss, high breakdown strength, high discharged energy density and high charge-discharge efficiency make the oriented P(VDF-HFP)/BNNS nanocomposites promising as a dielectric film for high energy density capacitor.