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Liu et al. Microstructures 2023;3:2023008 Microstructures
DOI: 10.20517/microstructures.2022.31

Research Article Open Access

Trilayer PVDF nanocomposites with significantly

enhanced energy density and energy efficiency
using 0.55Bi Na TiO -0.45(Sr Bi )TiO nanofibers
0.5
3
3
0.5
0.7
0.2
Yuan Liu, Hang Luo , Haoran Xie, Zhida Xiao, Fan Wang, Xun Jiang, Xuefan Zhou, Dou Zhang
Powder Metallurgy Research Institute, State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083,
Hunan, China.
Correspondence to: Prof./Dr. Hang Luo, Powder Metallurgy Research Institute, State Key Laboratory of Powder Metallurgy,
Central South University, Changsha 410083, Hunan, China. E-mail: hangluo@csu.edu.cn; Prof./Dr. Dou Zhang, Powder
Metallurgy Research Institute, State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, Hunan,
China. E-mail: dzhang@csu.edu.cn
How to cite this article: Liu Y, Luo H, Xie H, Xiao Z, Wang F, Jiang X, Zhou X, Zhang D. Trilayer PVDF nanocomposites with
significantly enhanced energy density and energy efficiency using 0.55Bi Na TiO -0.45(Sr Bi )TiO nanofibers.
0.5
0.2
3
0.7
3
0.5
Microstructures 2023;3:2023008. https://dx.doi.org/10.20517/microstructures.2022.31
Received: 28 Sep 2022 First Decision: 24 Oct 2022 Revised: 5 Nov 2022 Accepted: 30 Nov 2022 Published: 11 Jan 2023
Academic Editors: Ruzhong Zuo, Shujun Zhang Copy Editor: Fangling Lan Production Editor: Fangling Lan
Abstract
The development of dielectric capacitors with high energy density and energy efficiency is of great significance in
the modern electronic components market. To reduce the high energy loss of Bi Na TiO , 0.55Bi Na TiO
0.5 0.5 3 0.5 0.5 3
-0.45(Sr Bi )TiO (BNT-BST) nanofibers with a high aspect ratio are synthesized via electrospinning. To achieve
0.7 0.2 3
a high energy density, the design of a symmetric trilayer nanocomposite consisting of a BNT-BST/polyvinylidene
difluoride (PVDF) layer with a high dielectric constant sandwiched between two layers of pure PVDF is herein
described. The trilayer structure can effectively alleviate the electric field concentration effect, resulting in a
considerably enhanced breakdown strength and improved discharge energy density. The maximum discharge
energy density of 17.37 J/cm at 580 kV/mm could be achieved in the symmetric trilayer nanocomposite with a
3
3
BNT-BST/PVDF middle layer, which is 90.5% greater than that achieved using pure PVDF (9.21 J/cm at
450 kV/mm). This study presents a new case for developing dielectric capacitors with high energy density.

Keywords: Trilayer structure, electrospinning, 0.55Bi Na TiO -0.45(Sr Bi )TiO nanofibers, breakdown
0.5 0.5 3 0.7 0.2 3
strength, energy density

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