Enhanced discharged energy density of nanocomposites with dopamine@BaTiO₃ whiskers

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.

KEYWORDS:

• BaTiO₃ whiskers
• P(VDF-HFP)
• nanocomposites
• dopamine
• discharged energy density

Acknowledgments

This work was supported by the National Nature Science Foundation of China (NSFC No. 51372114 and 51572123), the Research Fund of State Key Laboratory of Mechanics and Control of Mechanical Structures (Nanjing University of Aeronautics and astronautics) (Grant No. MCMS-0518K01), the special fund of 333 high-level talents training project in Jiangsu province (BRA2017424) and A Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by the The National Nature Science Foundation of China [51572123];The National Nature Science Foundation of China [51372114];