Gradient design of ultrasmall dielectric nanofillers for PVDF-based high energy-density composite capacitors
Dielectric capacitors are key devices in pulsed power systems for their high power density. To improve the energy density, compact nanocomposite films comprising PVDF polymer and core-shell BaTiO3@TiO2 nanoparticles are prepared, in which the BaTiO3 (d ~ 8 nm) nanoparticles are encapsulated by the a...
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doaj-9115b7bbbac04d56b205f0530aec328e2020-11-24T21:54:07ZengElsevierMaterials & Design0264-12752020-04-01189Gradient design of ultrasmall dielectric nanofillers for PVDF-based high energy-density composite capacitorsYanan Hao0Zunpeng Feng1Zhengda He2Jiameng Zhang3Xiaoming Liu4Jing Qin5Limin Guo6Ke Bi7State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, ChinaState Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, ChinaState Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, ChinaState Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, ChinaSchool of Metallurgy, Northeastern University, Shenyang 110819, China; Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education), Northeastern University, Shenyang 110819, China; Correspondence to: X. Liu, School of Metallurgy, Northeastern University, Shenyang 110819, China.State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, ChinaState Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, ChinaState Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China; Correspondence to: K. Bi, School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China.Dielectric capacitors are key devices in pulsed power systems for their high power density. To improve the energy density, compact nanocomposite films comprising PVDF polymer and core-shell BaTiO3@TiO2 nanoparticles are prepared, in which the BaTiO3 (d ~ 8 nm) nanoparticles are encapsulated by the amorphous TiO2 shell layer. Compared to the conventional BaTiO3/PVDF nanocomposite, the BaTiO3@TiO2/PVDF nanocomposite in this report takes advantage of the small particle size and the gradient dielectric design of the interface, which enhances the electric displacement as high as 65% and the breakdown strength of 20% simultaneously. A maximal discharged energy density of 11.34 J·cm−3 is achieved under an electric field of 420 kV·mm−1 in the nanocomposite film containing 5 vol% BaTiO3@10 wt%TiO2. Therefore, the gradient design of ultrasmall dielectric nanofillers shows high potential in fabrication of high energy-density nanocomposite. Keywords: Energy storage, Polymer nanocomposites, Interfaces, Dielectric, Core-shellhttp://www.sciencedirect.com/science/article/pii/S0264127520300563 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yanan Hao Zunpeng Feng Zhengda He Jiameng Zhang Xiaoming Liu Jing Qin Limin Guo Ke Bi |
spellingShingle |
Yanan Hao Zunpeng Feng Zhengda He Jiameng Zhang Xiaoming Liu Jing Qin Limin Guo Ke Bi Gradient design of ultrasmall dielectric nanofillers for PVDF-based high energy-density composite capacitors Materials & Design |
author_facet |
Yanan Hao Zunpeng Feng Zhengda He Jiameng Zhang Xiaoming Liu Jing Qin Limin Guo Ke Bi |
author_sort |
Yanan Hao |
title |
Gradient design of ultrasmall dielectric nanofillers for PVDF-based high energy-density composite capacitors |
title_short |
Gradient design of ultrasmall dielectric nanofillers for PVDF-based high energy-density composite capacitors |
title_full |
Gradient design of ultrasmall dielectric nanofillers for PVDF-based high energy-density composite capacitors |
title_fullStr |
Gradient design of ultrasmall dielectric nanofillers for PVDF-based high energy-density composite capacitors |
title_full_unstemmed |
Gradient design of ultrasmall dielectric nanofillers for PVDF-based high energy-density composite capacitors |
title_sort |
gradient design of ultrasmall dielectric nanofillers for pvdf-based high energy-density composite capacitors |
publisher |
Elsevier |
series |
Materials & Design |
issn |
0264-1275 |
publishDate |
2020-04-01 |
description |
Dielectric capacitors are key devices in pulsed power systems for their high power density. To improve the energy density, compact nanocomposite films comprising PVDF polymer and core-shell BaTiO3@TiO2 nanoparticles are prepared, in which the BaTiO3 (d ~ 8 nm) nanoparticles are encapsulated by the amorphous TiO2 shell layer. Compared to the conventional BaTiO3/PVDF nanocomposite, the BaTiO3@TiO2/PVDF nanocomposite in this report takes advantage of the small particle size and the gradient dielectric design of the interface, which enhances the electric displacement as high as 65% and the breakdown strength of 20% simultaneously. A maximal discharged energy density of 11.34 J·cm−3 is achieved under an electric field of 420 kV·mm−1 in the nanocomposite film containing 5 vol% BaTiO3@10 wt%TiO2. Therefore, the gradient design of ultrasmall dielectric nanofillers shows high potential in fabrication of high energy-density nanocomposite. Keywords: Energy storage, Polymer nanocomposites, Interfaces, Dielectric, Core-shell |
url |
http://www.sciencedirect.com/science/article/pii/S0264127520300563 |
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