Building Hierarchical Interfaces Using BaSrTiO<sub>3</sub> Nanocuboid Dotted Graphene Sheets in an Optimized Percolative Nanocomposite with Outstanding Dielectric Properties

Luo, Hang; Zhou, Kechao; Bowen, Chris R.; Zhang, Ye; Wei, Anqi; Wu, Zhong; Chen, Chao

doi:10.1002/admi.201600157

Cited by 28 publications

(9 citation statements)

References 38 publications

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“…As illustrated in Fig. 2a, the dielectric permittivity increases obviously with increasing the BT content, which should be attributed to the enhanced interfacial polarizations at enlarged BT-PVDF and 16,19 BT-CNT interfaces. Particularly, a significant enhancement of permittivity from 4000 @10 kHz to 7000 @10 kHz was observed when the BT content increased from 60 to 70 wt% which should be ascribed to the formation of percolative BT networks and severely enlarged interfaces within the composites.…”

Section: Dielectric and Electric Properties Of Single-layer Ternary Nmentioning

confidence: 86%

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Enhancing Dielectric Performance of Poly(vinylidene fluoride) Nanocomposites via Controlled Distribution of Carbon Nanotubes and Barium Titanate Nanoparticles

Wang¹,

Shi²,

Wang³

et al. 2018

Eng. Sci.

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Polymer-based dielectric materials have attracted increasing attention owing to their huge potential applications in modern electronic devices. The dielectric behaviors of polymer composites are greatly determined by the distribution of fillers, thus the clarification of the relationship between the dielectric properties of the composites and the spatial distribution of fillers would be highly favorable for designing novel high-performance dielectrics. Herein, the dielectric performances of ternary composites consisting of barium titanate (BT), carbon nanotube (CNT) and poly(vinylidene fluoride) (PVDF) were investigated. For comparison, the dielectric properties of trilayer 3 composites were also studied. The ternary composites exhibited an ultra-high dielectric constant of 7×10 @10 kHz, but a high loss tangent of 25 @10 kHz. For the trilayer composites, the BT/PVDF outer layers could restrain the development of leakage current, leading to low loss tangent (0.03 @10 kHz) and high breakdown strength. Meanwhile, the trilayer composites also achieved a high dielectric constant of 95 @10 kHz owing to the considerably enhanced polarizations at the filler/matrix and layer/layer interfaces. This research provides important sights into the relationship between the dielectric properties of the composites and the spatial distributions of fillers, which will strongly boost the exploration of high-performance dielectrics.

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Section: Dielectric and Electric Properties Of Single-layer Ternary Nmentioning

confidence: 86%

“…As shown in Fig. 3c, the loss gradually increases with increasing the frequency due to the fact that some types of polarizations with long relaxation time cannot keep up with the fast change of electric field 16,19 direction. Fig.…”

Section: Dielectric and Electric Properties Of Trilayer Nanocompositesmentioning

confidence: 98%

Enhancing Dielectric Performance of Poly(vinylidene fluoride) Nanocomposites via Controlled Distribution of Carbon Nanotubes and Barium Titanate Nanoparticles

Wang¹,

Shi²,

Wang³

et al. 2018

Eng. Sci.

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“…The BNNSs with high к serve as tough scaffold and insulating barrier to simultaneously enhance the mechanical, electrical and thermal properties of nanocomposites . However, to improve the compatibility between the organic and inorganic constituents, surface treatment of the nanofillers with modifiers, like dopamine, H 2 O 2 and phosphonic acid, are necessary, which may introduce extra impurities and make the fabrication process more complicated. Polymer blending, is another straightforward and effective approach to enhance breakdown strength and energy density.…”

Section: Introductionmentioning

confidence: 99%

A Ferroconcrete‐Like All‐Organic Nanocomposite Exhibiting Improved Mechanical Property, High Breakdown Strength, and High Energy Efficiency

Dan

Jiang

Qian

et al. 2019

Macro Materials & Eng

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Polymer‐based nanocomposite dielectrics with high energy storage capacity are crucial enablers for numerous applications in modern electronic and electrical industries. The energy density of parallel plate capacitors is determined by breakdown strength and dielectric permittivity of the inner dielectrics. Poly(vinylidene fluoride‐trifluoroethylene‐chlorofluoroethylene) (P(VDF‐TrFE‐CFE)), with the highest permittivity among all the dielectric polymers, is a promising candidate for high energy density capacitors. However, its relatively low breakdown strength and energy efficiency restrict the applications. In this work, a new method combining combinatorial‐electrospinning and hot‐pressing is proposed to fabricate P(VDF‐TrFE‐CFE)‐based all‐organic dielectrics with ferroconcrete‐like structure. In this structure, continuous fibers of polysulfone (PSF) with high Young's modulus act as tough scaffold to improve the mechanical properties of nanocomposites, and an over 750% enhancement of Young's modulus is obtained. The enhanced mechanical properties bring about significant improvement in Weibull breakdown strength to 485 MV m−1, more than 50% higher than neat terpolymer. Furthermore, the suppressed leakage current and conduction loss, and hence the improved discharge energy efficiency under moderate electric field, are achieved due to the high insulation of PSF and its interfacial restriction on space charge mobility.

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“…Interfacial polarization is a topic with intense interest in many fields of material science, such as photovoltaic, photocatalytic, ferro-/piezoelectric, and dielectric materials, etc. − Recently, polymer based capacitors have been extensively explored due to their advantages of ultrahigh power density compared to other renewable energy systems. − Ferroelectric ceramic nanofillers are being employed by incorporating them into polymer matrixes to create polymer nanocomposites due to their potential to achieve a high energy density through combination of the advantages from the hybrids. − Nanosized ceramic fillers embedded in a polymer matrix leads to the formation of a large interfacial region, which becomes a key factor to affect the energy storage properties of the nanocomposites. − One challenge is to understand the mechanism of interfacial regions determining the dielectric properties and energy storage capability of the dielectric nanocomposites. − Researchers revealed the effect inorganic buffer layer thickness on the performance of polymer nanocomposite. Huang et al prepared BaTiO 3 nanowires with variable TiO 2 shell thicknesses and TiO 2 nanowires with variable BaTiO 3 shell thicknesses, respectively.…”

Section: Introductionmentioning

confidence: 99%

Core–Shell Nanostructure Design in Polymer Nanocomposite Capacitors for Energy Storage Applications

Luo

Chen

Liu

et al. 2018

ACS Sustainable Chem. Eng.

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102

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The ability to tune the interfacial layer in nanocomposites is attracting increasing interest due to its wide application in the field of nanoscale energy storage materials. However, most of the current interfacial modifiers are flexible coils collapsing on the surface of fillers. The interfacial layer thickness cannot be readily tailored. This work demonstrates an inspiring approach to design the interfacial layer of BaTiO3 nanowires and nanoparticles with poly{5-bis[(4-trifluoro-methoxyphenyl)oxycarbonyl]styrene} (PTFMPCS). The PTFMPCS is a kind of fluoric-liquid-crystalline polymer (LCPs) that possesses polymer-chain rigidity and an orientated structure, which is useful to design the interfacial layer thicknesses of fillers. Four types of BaTiO3@PTFMPCS nanostructures are prepared and incorporated into a polymer matrix for capacitor applications. The experimental results show that the PTFMPCS interfacial layer thicknesses are precisely controlled and in good agreement with the theoretically predicted thicknesses. In addition, the performance of the nanocomposites are obviously affected by the PTFMPCS interfacial layer thickness, e.g., the discharge energy density of the nanocomposites with a 14.8 nm thickness of the PTFMPCS layer increased by 8.5% than with 9.2 nm, which reaches to 14.64 J/cm3. The findings provide an innovative way to design the interfacial layer thickness in various nanostructured materials for applications related to energy storage.

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Building Hierarchical Interfaces Using BaSrTiO₃ Nanocuboid Dotted Graphene Sheets in an Optimized Percolative Nanocomposite with Outstanding Dielectric Properties

Abstract: A novel percolative nanocomposite with super‐high permittivity and supressed dielectric loss is achieved, which is due to the hierarchical interfaces induced by BaSrTiO3 nanocuboid dotted graphene sheets and further modification of dapamine.

Cited by 28 publications

References 38 publications

Enhancing Dielectric Performance of Poly(vinylidene fluoride) Nanocomposites via Controlled Distribution of Carbon Nanotubes and Barium Titanate Nanoparticles

Enhancing Dielectric Performance of Poly(vinylidene fluoride) Nanocomposites via Controlled Distribution of Carbon Nanotubes and Barium Titanate Nanoparticles

A Ferroconcrete‐Like All‐Organic Nanocomposite Exhibiting Improved Mechanical Property, High Breakdown Strength, and High Energy Efficiency

Core–Shell Nanostructure Design in Polymer Nanocomposite Capacitors for Energy Storage Applications

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Building Hierarchical Interfaces Using BaSrTiO3 Nanocuboid Dotted Graphene Sheets in an Optimized Percolative Nanocomposite with Outstanding Dielectric Properties

Abstract: A novel percolative nanocomposite with super‐high permittivity and supressed dielectric loss is achieved, which is due to the hierarchical interfaces induced by BaSrTiO3 nanocuboid dotted graphene sheets and further modification of dapamine.

Cited by 28 publications

References 38 publications

Enhancing Dielectric Performance of Poly(vinylidene fluoride) Nanocomposites via Controlled Distribution of Carbon Nanotubes and Barium Titanate Nanoparticles

Enhancing Dielectric Performance of Poly(vinylidene fluoride) Nanocomposites via Controlled Distribution of Carbon Nanotubes and Barium Titanate Nanoparticles

A Ferroconcrete‐Like All‐Organic Nanocomposite Exhibiting Improved Mechanical Property, High Breakdown Strength, and High Energy Efficiency

Core–Shell Nanostructure Design in Polymer Nanocomposite Capacitors for Energy Storage Applications

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Product

Resources

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Building Hierarchical Interfaces Using BaSrTiO₃ Nanocuboid Dotted Graphene Sheets in an Optimized Percolative Nanocomposite with Outstanding Dielectric Properties