Core–shell structured BaTiO<sub>3</sub>@carbon hybrid particles for polymer composites with enhanced dielectric performance

Feng, Yu; Li, Wei Li; Wang, J. P.; Yin, Jinghua; Fei, W. D.

doi:10.1039/c5ta04777c

Cited by 91 publications

(58 citation statements)

References 58 publications

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“…They used the chemical vapor deposition (CVD) method to grow fewer CNTs on the surface of BT (BT@CNTs), and found that BT@CNTs greatly improve the dielectric properties of poly(vinylidene fluoride‐co‐hexafluoropropylene) (PVDF‐HFP). The BT@CNTs/PVDF‐HFP with 10 vol% BT@CNTs had a permittivity of 27.7 at 10 3 Hz, which was 1.65 times higher than the BT/PVDF‐HFP with 10 vol% BT, while the dielectric loss was even lower than pure PVDF‐HFP …”

Section: Cnts/polymer Dielectric Nanocompositesmentioning

confidence: 95%

1D/2D Carbon Nanomaterial‐Polymer Dielectric Composites with High Permittivity for Power Energy Storage Applications

Dang

Zheng

2016

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With the development of flexible electronic devices and large-scale energy storage technologies, functional polymer-matrix nanocomposites with high permittivity (high-k) are attracting more attention due to their ease of processing, flexibility, and low cost. The percolation effect is often used to explain the high-k characteristic of polymer composites when the conducting functional fillers are dispersed into polymers, which gives the polymer composite excellent flexibility due to the very low loading of fillers. Carbon nanotubes (CNTs) and graphene nanosheets (GNs), as one-dimensional (1D) and two-dimensional (2D) carbon nanomaterials respectively, have great potential for realizing flexible high-k dielectric nanocomposites. They are becoming more attractive for many fields, owing to their unique and excellent advantages. The progress in dielectric fields by using 1D/2D carbon nanomaterials as functional fillers in polymer composites is introduced, and the methods and mechanisms for improving dielectric properties, breakdown strength and energy storage density of their dielectric nanocomposites are examined. Achieving a uniform dispersion state of carbon nanomaterials and preventing the development of conductive networks in their polymer composites are the two main issues that still need to be solved in dielectric fields for power energy storage. Recent findings, current problems, and future perspectives are summarized.

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Section: Cnts/polymer Dielectric Nanocompositesmentioning

confidence: 95%

1D/2D Carbon Nanomaterial‐Polymer Dielectric Composites with High Permittivity for Power Energy Storage Applications

Dang

Zheng

2016

Small

430

215

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“…One common approach in high-k polymer composites is to incorporate ceramic fillers into a polymer matrix. Poly (vinylidene fluoride) (PVDF) based polymers have been investigated due to higher permittivity than other polymers [7][8][9]. Some high dielectric constant ceramics, such as barium titanate (BT), barium strontium titanate (BST) [9] and calcium copper titanate (CCTO) [10,11] have been used as fillers.…”

Section: Introductionmentioning

confidence: 99%

Enhanced dielectric properties of polymer matrix composites with BaTiO3 and MWCNT hybrid fillers using simple phase separation

2016

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Poly (vinylidene fluoride) (PVDF) matrix hybrid nanocomposites, featuring ferroelectric barium titanate (BT) nanoparticles and multi-walled carbon nanotubes (MWCNT) embedded in the polymer, were fabricated by a miscible-immiscible coagulation method followed by hot pressing. SEM images showed good distribution of the ceramic nanoparticles with very little particle agglomeration. The conductive MWCNT increased the charge storage ability of the matrix polymer by serving as a polarized charge transport phase for the ferroelectric nanoparticles, while the small MWNT amounts used prevented the formation of conductive networks. The simple processing method utilized resulted in composites with high real permittivity and low dielectric loss over a wide range of frequency (10 Hz to 1 MHz). The dielectric properties of the polymer matrix nanocomposites with hybrid fillers (BT with and without MWNT) were improved by optimizing the synergistic effects between the charge storage behavior of the ferroelectric phase and the charge transport behavior of the conductive phase. The best combination of real permittivity and dielectric loss properties (71.7 and 0.045 respectively) were obtained for the nanocomposites containing 37.1 vol % of BaTiO 3 and 3 vol % of MWCNT. In addition to achieving reliable dielectric properties, the nanocomposites also displayed flexibility making these composites potentially useful for many flexible electronic devices and electrostatic energy storage devices.

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“…polarization between the PVDF matrix and CCTO@Ni filler, which is the same as the related literature. 16, 35 These results demonstrate that magnetic treatment may significantly enhance the dielectric permittivity of PVDF composites. Figure 7 shows how the magnetic field treatment affected the conductivity of PVDF#1-3 at room temperature.…”

Section: B Dielectric Properties Of Pvdf and The Untreated Pvdf Compmentioning

confidence: 64%

“…[21][22][23] The CCTO sol was produced by adding C 16 The core-shell CCTO ceramic was produced by depositing Ni nanoparticles on CCTO microparticles by electroless plating. 24,25 To clean the microparticles, 8 g of CCTO particles were dispersed by ultrasonication for 30 min in an 80 mL solution of 80 vol.% hydrogen fluoride and water.…”

Section: Methodsmentioning

confidence: 99%

“…15,16 Because improving the dispersion of fillers in polymer matrix can improve the dielectric permittivity of ceramics/polymer composites, many methods have been studied to modify the surface of pertinent ceramic particles. 9,[16][17][18][19] For example, Rajesh et al 17 synthesized epoxy-resin composites with a 30 vol.% Ag-coated Al 2 O 3 ceramic filler, which displayed a high dielectric permittivity of 370 at 1 MHz. Yang et al 18 synthesized a kind of functional CCTO@Ag ceramic particles, namely, Ag was deposited on the surface of CCTO nanoparticle, and obtained a high dielectric permittivity of 103 for PI/CCTO@Ag composite material with a 3 vol% CCTO@Ag loading.…”

Section: Introductionmentioning

confidence: 99%

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Effects of magnetic field treatment on dielectric properties of CCTO@Ni/PVDF composite with low concentration of ceramic fillers

et al. 2015

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Using melt mixing, we produced a ceramic/polymer composite with a matrix of polyvinylidene fluoride (PVDF) and a filler of 5 vol.% Ni-deposited CaCu3Ti4O12 core-shell ceramic particles (CCTO@Ni), and studied its prominent dielectric characteristics for the first. Its phase composition and morphology were analyzed by X-ray diffraction and scanning electron microscopy, respectively. After treating the composite films with various durations of a magnetic field treatment, we compared their dielectric properties. We found that the CCTO@Ni ceramic had a typical urchin-like core-shell structure, and that different durations of the magnetic field treatment produced different distributions of ceramic particles in the PVDF matrix. The dielectric permittivity of the untreated CCTO@Ni/PVDF composite was 20% higher than that of neat PVDF, and it had a low loss tangent. However, only the composite treated for 30 min in the magnetic field had an ultra-high dielectric permittivity of 1.41 × 104 at 10 Hz, three orders of magnitude higher than the untreated composite, which declined dramatically with increasing frequency, accompanied by an insulating-conducting phase transition and an increase in loss tangent. Our results demonstrate that changes in the dielectric properties of PVDF composites with magnetic field treatment are closely related to the percolation effect and interfacial polarization.

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

Abstract: Core–shell structured BaTiO3@carbon hybrid particles fabricated via chemical vapor deposition can remarkably enhance the dielectric performance of polymer composites.

Cited by 91 publications

References 58 publications

1D/2D Carbon Nanomaterial‐Polymer Dielectric Composites with High Permittivity for Power Energy Storage Applications

1D/2D Carbon Nanomaterial‐Polymer Dielectric Composites with High Permittivity for Power Energy Storage Applications

Enhanced dielectric properties of polymer matrix composites with BaTiO3 and MWCNT hybrid fillers using simple phase separation

Effects of magnetic field treatment on dielectric properties of CCTO@Ni/PVDF composite with low concentration of ceramic fillers

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

Abstract: Core–shell structured BaTiO3@carbon hybrid particles fabricated via chemical vapor deposition can remarkably enhance the dielectric performance of polymer composites.

Cited by 91 publications

References 58 publications

1D/2D Carbon Nanomaterial‐Polymer Dielectric Composites with High Permittivity for Power Energy Storage Applications

1D/2D Carbon Nanomaterial‐Polymer Dielectric Composites with High Permittivity for Power Energy Storage Applications

Enhanced dielectric properties of polymer matrix composites with BaTiO3 and MWCNT hybrid fillers using simple phase separation

Effects of magnetic field treatment on dielectric properties of CCTO@Ni/PVDF composite with low concentration of ceramic fillers

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