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Multiple Interfacial Fe3O4@BaTiO3/P(VDF-HFP) CoreShell-Matrix Films with Internal Barrier Layer Capacitor (IBLC) Effects and High Energy Storage Density Ling Zhou, Qiuyun Fu, Fei Xue, Xiahui Tang, Dongxiang Zhou, Yahui Tian, Geng Wang, Chaohong Wang, Haibo Gou, and Lei Xu ACS Appl. Mater. Interfaces, Just Accepted Manuscript • DOI: 10.1021/acsami.7b10923 • Publication Date (Web): 01 Nov 2017 Downloaded from http://pubs.acs.org on November 2, 2017
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ACS Applied Materials & Interfaces
Multiple Interfacial Fe3O4@BaTiO3/P(VDF-HFP) Core-Shell-Matrix Films with Internal Barrier Layer Capacitor (IBLC) Effects and High Energy Storage Density Ling Zhou†‡, Qiuyun Fu†‡,*, Fei Xue§, Xiahui Tang†, Dongxiang Zhou†‡, Yahui Tian†‡, Geng Wang†‡, Chaohong Wang †‡, Haibo Gou †‡ and Lei Xu †,ǁ †
School of Optical and Electronic Information, ‡Engineering Research Center for
Functional Ceramics of the Ministry of Education, Huazhong University of Science and Technology, Wuhan 430074, P. R. China. §
Center of Collaboration and Innovation, Jiangxi University of Technology, Nanchang, Jiangxi, 330098, P. R. China ǁ
Institute of Huazhong University of Science and Technology, 9 Yuexingsandao, Nanshan District, Shenzhen 518000, China
Key words Core-shell-matrix, Energy storage density, Multiple interfaces, Internal barrier layer capacitor effect, Maxwell–Wagner capacitor model.
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Abstract Flexible nanocomposites composed of high dielectric constant fillers and polymer matrix have shown great potential for electrostatic capacitors and energy storage applications. To obtain the composited material with high dielectric constant and high breakdown strength, multi-interfacial composited particles, which composed of conductive cores and insulating shells and possessed the internal barrier layer capacitor (IBLC) effect, were adopted as fillers. Thus, Fe3O4@BaTiO3 core-shell particles
were
prepared
and
loaded
into
the
poly-(vinylidene
fluoride-co-hexafluoropropylene) (P(VDF-HFP)) polymer matrix. As the mass fraction of core-shell fillers increased from 2.5 wt.% to 30 wt.%, the dielectric constant of the films increased, while the loss tangent remained at a low level (
