Work

Enhancing Energy Density of BaTiO3-Bi(M)O3@SiO2/PVDF Nanocomposites via Filler Component Modulation and Film Structure Design

Year: 2025

Type: article

Abstract: The low energy density (Ud) of polymeric dielectrics is unfavorable for the integration and miniaturization of electronics, thus limiting their application prospects. Introducing high-εr (dielectric constant) ceramic nanofillers to polymer matrices is the most common strategy to enhance their εr, and hence their Ud. By comparison, enhancing breakdown strength (Eb) is a more effective strategy to enhance Ud. Herein, 0.6BaTiO3-0.4Bi(Mg0.5Ti0.5)O3 and 0.85BaTiO3-0.15Bi(Mg0.5Zr0.5)O3 nanofibers coated with SiO2 were utilized as fillers in PVDF-based nanocomposites. The combination of experimental and simulation results suggests that the intrinsic properties of nanofillers are the determining factor of the Eb of polymer-based nanocomposites, and SiO2 coating and film structure design are effective strategies to enhance their Eb, and consequently their Ud. As a result, the sandwich-structured PVDF/6 wt% 0.85BaTiO3-0.15Bi(Mg0.5Zr0.5)O3@SiO2 nanofiber within PVDF/PVDF nanocomposite films achieved a maximum Ud of 11.1 J/cm3 at an Eb of 458 MV/m, which are 2.15 and 1.40 times those of pristine PVDF, respectively.

Source: Nanomaterials

DOI: 10.3390/nano15080569

Authors: Jin Hu, Fangfang Liu

Institutions: Dalian University of Technology, State Key Laboratory of Fine Chemicals, National University of Defense Technology

Language: English

Topic: Dielectric materials and actuators

Subfield: Biomedical Engineering

Field: Engineering

Domain: Physical Sciences

SDGs: Industry, innovation and infrastructure, Affordable and clean energy

Open Access status: gold

Estimated APC paid: $2,896