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Towards inhibiting conductivity of Mo/PVDF composites through building MoO3 shell as an interlayer for enhanced dielectric properties

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Abstract

Polymer dielectrics have received increasing attention owing to their wide applications in electrical, microelectronic and energy storage fields. However, it remains a challenging to prepare polymer dielectrics with a high dielectric constant (ε) but low dissipation factor (tanδ). In this work, conductive molybdenum (Mo) particles were encapsulated by a thin layer of semi-conductive molybdenum trioxide (MoO3) with a wide bandgap of 3.28 eV via a facile thermal calcination way under air, and the gained core–shell structured Mo@MoO3 particles were composited with poly(vinylidene fluoride) (PVDF) to generate morphology-controllable high-ε but low loss composites. The large ε can be realized in the PVDF composites with the Mo@MoO3, and both the electric conductivity and tanδ of the composites are significantly restrained to rather low levels even at high filler loadings, and apparently decrease with increasing the MoO3’ shell thickness. The significantly ameliorated dielectric performances can be ascribed to the presence of MoO3 interlayer preventing the Mo particles from direct contact with each other and simultaneously hindering the long-range electron migration. The developed Mo@MoO3/PVDF composites with a high ε but low loss are great potential applications for electrical industries and microelectronic industries.

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Funding

The authors gratefully acknowledge the financial supports from the National Natural Science Foundation of China (No. 51937007), Shaanxi Provincial Natural Science Foundation, China (No. 2022JM-186), and acknowledge the Analytic Instrumentation Center of XUST.

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Authors and Affiliations

  1. School of Chemistry and Chemical Engineering, Xi’an University of Science & Technology, Xi’an, 710054, China

    Weiwei Peng, Wenying Zhou, Ting Li, Juanjuan Zhou, Tian Yao, Hongju Wu, Xueting Zhao, Jin Luo & Jiaxin Liu

  2. Academy of Agricultural Planning and Engineering, Key Laboratory of Technologies and Models for Cyclic Utilization From Agricultural Resources, Ministry of Agriculture, Beijing, 100125, China

    Dongli Zhang

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  1. Weiwei Peng
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Contributions

All authors contributed to the study conception and design. WZ, TL, JZ and TY participated in the material preparation, data collection and analysis. WZ, DZ and WP carried out the study and collected important background information. Characterization and related discussion were performed by HW, XZ, JL and JL. Funding acquisition and Project administration were performed by WZ, DZ. The first draft of the manuscript was written by WP and all authors commented on previous versions of the manuscript. All authors have read and approved the final manuscript.

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Correspondence to Wenying Zhou or Dongli Zhang.

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The authors have no relevant financial or non-financial interests to disclose. The authors have no conflicts of interest to declare that are relevant to the content of this article. All authors certify that they have no affiliations with or involvement in any organization or entity with any financial interest or non-financial interest in the subject matter or materials discussed in this manuscript. The authors have no financial or proprietary interests in any material discussed in this article. Authors are responsible for correctness of the statements provided in the manuscript. See also Authorship Principles. The Editor-in-Chief reserves the right to reject submissions that do not meet the guidelines described in this section.

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Peng, W., Zhou, W., Li, T. et al. Towards inhibiting conductivity of Mo/PVDF composites through building MoO3 shell as an interlayer for enhanced dielectric properties. J Mater Sci: Mater Electron 33, 14735–14753 (2022). https://doi.org/10.1007/s10854-022-08393-5

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