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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Main Authors:	Yanan Hao, Zunpeng Feng, Zhengda He, Jiameng Zhang, Xiaoming Liu, Jing Qin, Limin Guo, Ke Bi
Format:	Article
Language:	English
Published:	Elsevier 2020-04-01
Series:	Materials & Design
Online Access:	http://www.sciencedirect.com/science/article/pii/S0264127520300563

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spelling	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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Gradient design of ultrasmall dielectric nanofillers for PVDF-based high energy-density composite capacitors

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