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

被引：93
作者：
Feng, Y. [1 ,2 ]
Li, W. L. [1 ,3 ]
Wang, J. P. [1 ]
Yin, J. H. [2 ]
Fei, W. D. [1 ,4 ]
机构：
[1] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China
[2] Harbin Univ Sci & Technol, Key Lab Engn Dielect & Its Applicat, Minist Educ, Harbin 150080, Peoples R China
[3] Harbin Inst Technol, Natl Key Lab Sci & Technol Precis Heat Proc Met, Harbin 150001, Peoples R China
[4] Harbin Inst Technol, Sch Mat Sci & Engn, State Key Lab Adv Welding & Joining, Harbin 150001, Peoples R China
来源：
JOURNAL OF MATERIALS CHEMISTRY A | 2015年 / 3卷 / 40期
关键词：
LOW PERCOLATION-THRESHOLD; CHEMICAL-VAPOR-DEPOSITION; ALIGNED CARBON NANOTUBES; ENERGY-STORAGE; ELECTRICAL-PROPERTIES; HIGH-PERMITTIVITY; POLY(VINYLIDENE FLUORIDE); NANOCOMPOSITE CAPACITORS; 3-PHASE NANOCOMPOSITES; SURFACE-MORPHOLOGY;
D O I：
10.1039/c5ta04777c
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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.
引用
收藏
页码：20313 / 20321
页数：9
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