Abstract
ABSTRACT In this study, dopamine@BaTiO3 whiskers/P(VDF-HFP) nanocomposite films with high charge energy density were successfully prepared by a simple solution casting method. The BaTiO3 whiskers has been obtained under an optimized two-step hydrothermal condition. To alleviate the interfacial incompatibility, the BaTiO3 whiskers are modified by dopamine coating. The structure and morphology of dopamine@BaTiO3 whiskers have been well confirmed through XRD, SEM, and TEM. Further performance characterization of the nanocomposite films indicates that higher addition of BaTiO3 whiskers gives better dielectric properties and energy density. However, enhanced energy storage and high breakdown strength of nanocomposite can be obtained simultaneoulsy under suitable content.The maximal discharged energy density of the nanocomposite films with 5 vol% dopamine@BaTiO3 whiskers can reach 9.02 J/cm3, and the discharged efficiency remain 46.29% at 300 MV/m. These findings reveal a straightforward approach to improve the performance of the nanocomposite films.
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