Significantly enhanced energy storage in core–shell structured poly(vinylidene fluoride-co-chlorotrifluoroethylene)/BaTiO3@polyurea nanocomposite films

Nanocomposite polymer materials are commonly used in energy storage devices on account of the excellent dielectric performance. However, there is a long-standing contradiction between dielectric constant and breakdown strength of nanocomposite. In this study, polyurea (PUA) is designed to in situ mo...

Full description

Saved in:
Bibliographic Details
Published inJournal of materials science Vol. 55; no. 25; pp. 11296 - 11309
Main Authors Zhou, Yujiu, Liu, Qingxia, Chen, Fujia, Zhao, Yuetao, Sun, Song, Guo, Jimin, Yang, Yajie, Xu, Jianhua
Format Journal Article
LanguageEnglish
Published New York Springer US 01.09.2020
Springer Nature B.V
Subjects
Barium titanates
Characterization and Evaluation of Materials
Chemistry and Materials Science
Chlorotrifluoroethylene
Classical Mechanics
Composites & Nanocomposites
Core-shell structure
Crystallography and Scattering Methods
Dielectric breakdown
Dielectric strength
Energy storage
Flux density
Materials Science
Nanocomposites
Nanoparticles
Permittivity
Polymer Sciences
Solid Mechanics
Vinylidene
Vinylidene fluoride
Online AccessGet full text

Cover

More Information
Summary:Nanocomposite polymer materials are commonly used in energy storage devices on account of the excellent dielectric performance. However, there is a long-standing contradiction between dielectric constant and breakdown strength of nanocomposite. In this study, polyurea (PUA) is designed to in situ modify BaTiO 3 (BT) nanoparticles. Based on the excellent dispersity, favorable compatibility and outstanding insulating performance of BT@PUA particles, the P(VDF-CTFE)/BT@PUA nanocomposite exhibits enhanced breakdown strength and reliability. In addition, the introduction of BT@PUA enhanced the dielectric constant to 10.72 and 35% larger than that of pure P(VDF-CTFE). As a result, the energy density of BT@PUA composite reaches 8.94 J/cm 3 , which is 1.65 times than P(VDF-CTFE) (5.41 J/cm 3 ) and 4.5 times than the commercial biaxially oriented polypropylenes. Meanwhile, the quantified simulation illustrates the necessity of extremely high breakdown strength of the shell. Experiment results and simulation reveal that coating PUA is a novel and effective way to enhance energy storage performance for polymer nanocomposites with a promising broad application prospect.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-020-04828-8