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Issue 40, 2015
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Core–shell structured BaTiO3@carbon hybrid particles for polymer composites with enhanced dielectric performance

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Abstract

Core–shell structured BaTiO3@carbon (BT@C) hybrid particles were fabricated via chemical vapor deposition (CVD). Scanning electron microscopy, transmission electron microscopy, X-ray diffraction and Raman spectroscopy were carried out to confirm the successful fabrication. In order to research the effect of BT@C hybrid particles on the dielectric performance of polymer composites, PVDF-HFP/BT@C composites were prepared. With the increase of the volume fraction of BT@C, the dielectric constant of composites remarkably increased. The dielectric constant of the composite with 30 vol% BT@C is 1044 at 1 kHz, which is 118 times higher than that of PVDF-HFP (8.8). The experimental results fit well with the percolation theory. The energy storage density of all composites is larger than that of pure PVDF-HFP. The influence of the carbon-shell on the dielectric properties of composites is discussed and analyzed. The enhanced dielectric properties are attributed to the increased interfacial polarization in the carbon-shell. These attractive fabrication methods of BT@C and features of PVDF-HFP/BT@C composites suggest that the method proposed herein is a new approach for developing high performance composites.

Graphical abstract: Core–shell structured BaTiO3@carbon hybrid particles for polymer composites with enhanced dielectric performance

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Publication details

The article was received on 27 Jun 2015, accepted on 21 Aug 2015 and first published on 25 Aug 2015


Article type: Paper
DOI: 10.1039/C5TA04777C
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J. Mater. Chem. A, 2015,3, 20313-20321

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    Core–shell structured BaTiO3@carbon hybrid particles for polymer composites with enhanced dielectric performance

    Y. Feng, W. L. Li, J. P. Wang, J. H. Yin and W. D. Fei, J. Mater. Chem. A, 2015, 3, 20313
    DOI: 10.1039/C5TA04777C

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