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Sandwich structured BT-Fe3O4/PVDF composites with excellent dielectric properties and energy density

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Abstract

In this paper, BT-Fe3O4 hybrid particles were firstly fabricated using a chemical co-precipitation method, and then sandwich-structured BT-Fe3O4/PVDF composites (BT-Fe3O4/PVDF-S) were prepared. The influence of the BT-Fe3O4 and the sandwich structure on the dielectric properties of the composites was studied. The results showed that the BT-Fe3O4/PVDF-S composites exhibit enhanced dielectric performance. Interface activation E a shows that conductive Fe3O4 nanoparticles can increase the number of activated electrons at the interface between the Fe3O4 and PVDF matrix, which can significantly enhance the interface polarization and dielectric response under an electric field. In addition, because the excellent insulating property of the PVDF layer can prevent the leakage of current through the sample and suppress the dipole polarization, the conductivity as well as the dielectric loss of the composites were also reduced. Moreover, the energy density of the 5 vol% BT-Fe3O4/PVDF-S composites is 2.24 J/cm3 at 2100 kV/cm, which is an enhancement of 1.77 times compared to the BT/PVDF (1.26 J/cm3 at 1800 kV/cm). The findings provide a simple but effective way for nanocomposites to have enhanced dielectric properties for use in next-generation electronics.

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Acknowledgements

The authors gratefully acknowledge the support of the National Science Foundation of China (61640019), the Open Foundation of State Key Laboratory of Electronic Thin Films and Integrated Devices (KFJJ201601), Science Funds for the Young Innovative Talents of HUST (201102).

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Authors and Affiliations

  1. Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin, 150080, People’s Republic of China

    Yang Cui, Xuan Wang, Qingguo Chi, Jiufeng Dong, Tao Ma, Changhai Zhang & Qingquan Lei

  2. School of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin, 150080, People’s Republic of China

    Yang Cui, Xuan Wang & Qingguo Chi

  3. State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054, People’s Republic of China

    Qingguo Chi

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  1. Yang Cui
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  2. Xuan Wang
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  3. Qingguo Chi
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  4. Jiufeng Dong
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  5. Tao Ma
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Correspondence to Qingguo Chi.

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Cui, Y., Wang, X., Chi, Q. et al. Sandwich structured BT-Fe3O4/PVDF composites with excellent dielectric properties and energy density. J Mater Sci: Mater Electron 28, 11900–11906 (2017). https://doi.org/10.1007/s10854-017-6998-z

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  • DOI: https://doi.org/10.1007/s10854-017-6998-z

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