Improved dielectric and breakdown traits of polymer composites filled with KH-550 encapsulated multilayer black phosphorus

Huang H.; Huang Y.; Pan Y.; Wang Y.; Liu H.; Feng Y.

doi:10.1016/j.cap.2024.04.003

Article

Curr. Appl. Phys. 2024; 63: 7-17

Published online July 31, 2024 https://doi.org/10.1016/j.cap.2024.04.003

Improved dielectric and breakdown traits of polymer composites filled with KH-550 encapsulated multilayer black phosphorus

Huang H.; Huang Y.; Pan Y.; Wang Y.; Liu H.; Feng Y.

Key Laboratory of Extraordinary Bond Engineering and Advance Materials Technology (EBEAM) of Chongqing, School of Materials Science and Engineering, Yangtze Normal University, No.16, Juxian Avenue, Fuling District, Chongqing, 408100, China

Abstract

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Abstract

Polymer/particles composites are attractive for dielectric energy-storage, but they express difficultly-reconcilable conflict in high dielectric constant and breakdown strength. Here, multilayer black phosphorus (BP) coated by γ-aminopropyl triethoxysilane (KH-550) as filler, and poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) (P(VDF-TrFE-CFE)) as matrix were used to prepare composite films. KH-550 encapsulation enhances BP/matrix interfacial compatibility. Dielectric constant of polymer/BP@KH-550 composite is ∼207 at 20 Hz when filler load is 10 wt% (dielectric loss ∼0.11), combined with direct-current breakdown strength of ∼288 MV m−1. This work is beneficial to facile preparation of dielectric composites with well-balanced dielectric and breakdown properties for capacitive energy-storage. © 2024 Korean Physical Society

Keywords: Black phosphorus, Breakdown, Composites, Dielectric, KH-550