Abstract
Dielectric composites are regarded as potential energy storage materials for electric power systems and advanced electronics because of the tunable permittivity, excellent flexibility, and high electric breakdown strengths. However, for the moment, it is still a challenge to fabricate dielectric composites combining large electrical breakdown strength and high discharged energy density. Ferroelectric (K0.5Na0.5)NbO3 (KNN) particles are fabricated by solid-state reaction and introduced into poly(vinylidene fluoride) to improve energy storage capability. Particularly, the properties such as dielectric constant (εr), electric displacement, breakdown strength (Eb) and discharged energy density (Udis) are enhanced with the introduction of KNN particles. The composite containing 3 vol% KNN particles exhibits an ultrahigh Udis of 14.70 J·cm−3 at 480 kV·mm−1, which is approximately three times that of pure PVDF of 4.80 J·cm−3 at the applied electric field of 350 kV·mm−1. This research is of critical significance for proposing a convenient and effective way to design high discharged energy storage dielectric composites for future flexible portable capacitors. Keywords: dielectric composite, (K0.5Na0.5)NbO3 particle, breakdown strength, discharged energy density.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
