Ultrahigh Energy Density of Polymer Nanocomposites Containing BaTiO<sub>3</sub>@TiO<sub>2</sub> Nanofibers by Atomic‐Scale Interface Engineering

Zhang, Xin; Shen, Yang; Zhang, Qinghua; Gu, Lin; Hu, Yanqiang; Duan, Huan‐Feng; Lin, Yuanhua; Chen, Nan

doi:10.1002/adma.201404101

Cited by 530 publications

(293 citation statements)

References 27 publications

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“…Figure 8(b) shows the caluculated energy storage efficiency with the increasing of the radius R, the energy efficiency decreases. However, the efficiency is over 95% at R = 57 nm, which is higher than that of PVDF/BTO@TO_nfs [1] 7.5% BST NWs/PVDF [8] the reported BaTiO 3 @SrTiO 3 ceramics (about 90%) [9].…”

Section: Resultsmentioning

confidence: 68%

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Enhanced Energy Storage with Polar Vortices in Ferroelectric Nanocomposites

et al. 2017

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Nanocomposites of ferroelectric ceramic filler and polymer matrix show considerable promise as high energy storage dielectric capacitors. However, the influence of microstructure of the ferroelectric filler on the electric energy storage performance in the nanocomposite has not been quantitatively studied, yet it is a key element in understanding the methods employed to improve the performance of capacitors. We demonstrate an innovative strategy to enhance the energy storage density with topological vortex structures in nanocomposites. Using three dimensional phase field calculations, we show that multi-vortex structures can exist in ferroelectric nanowires without charge defects or free charges at the interface between the filler and matrix. The switching behavior of the topological structure (vortex and anti-vortex pair) under external electric field is calculated in nanocylinder wires. The small remnant polarization and very narrow hysteresis loop due to the vortex structure in the nanocomposites can lead to a large enhancement of energy density, as high as 5 J/cm 3 compared to 1-2 J/cm 3 for commercial capacitors, and high energy storage efficiency (over 95%) at a relatively low electric field of 140 MV/m.

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Section: Resultsmentioning

confidence: 68%

“…The energy density of commercial dielectric capacitors is usually of the order of 1-2 J/cm 3 , far inferior to electrochemical capacitors (≈ 20 J/cm 3 ) [1]. The energy density of a dielectric material is essentially given by U= EdP , where E is the electric field and P is the polarization.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Energy Storage with Polar Vortices in Ferroelectric Nanocomposites

et al. 2017

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“…A number of studies have reported ceramic/polymer nanocomposites with high energy density 6, 7. For example a discharge energy density of 20 J cm −3 at 646 kV mm −1 was reported for BaTiO 3 @TiO 2 core–shell fibers in a polyvinylidene fluoride polymer matrix (denoted as BaTiO 3 @TiO 2 /PVDF, where @ denotes a core–shell structure) 8. This was subsequently improved to 31.2 J cm −3 at 797.7 kV mm −1 for nanocomposites with large aspect ratio fibers as a result of their preferred orientation directions perpendicular to the external electric field 9.…”

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confidence: 99%

High Discharge Energy Density at Low Electric Field Using an Aligned Titanium Dioxide/Lead Zirconate Titanate Nanowire Array

et al. 2017

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Polymer‐based capacitors with high energy density have attracted significant attention in recent years due to their wide range of potential applications in electronic devices. However, the obtained high energy density is predominantly dependent on high applied electric field, e.g., 400–600 kV mm−1, which may bring more challenges relating to the failure probability. Here, a simple two‐step method for synthesizing titanium dioxide/lead zirconate titanate nanowire arrays is exploited and a demonstration of their ability to achieve high discharge energy density capacitors for low operating voltage applications is provided. A high discharge energy density of 6.9 J cm−3 is achieved at low electric fields, i.e., 143 kV mm−1, which is attributed to the high relative permittivity of 218.9 at 1 kHz and high polarization of 23.35 µC cm−2 at this electric field. The discharge energy density obtained in this work is the highest known for a ceramic/polymer nanocomposite at such a low electric field. The novel nanowire arrays used in this work are applicable to a wide range of fields, such as energy harvesting, energy storage, and photocatalysis.

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“…As an alternative, composite materials may be promising candidates for high-k applications. As we know, the dielectric properties of a composite will undergo signicant changes near its percolation threshold, [8][9][10][11] and numerous researches have conrmed that percolative composites are promising candidates for high-k materials with outstanding dielectric properties, such as tunable high permittivity, high dielectric strength, low loss, etc. Therefore, various strategies have been developed to obtain high-k according to percolation theory in composite materials, such as ferroelectric/polymer composites, [12][13][14] binary or ternary metal (or carbon)/polymer composites, [15][16][17] metal (or carbon)/ ceramic composites, etc.…”

Section: Introductionmentioning

confidence: 99%

Ni/Al₂O₃/epoxy high-k composites with ultralow nickel content towards high-performance dielectric applications

et al. 2016

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Nickel/alumina/epoxy three-phase composites consisting of nickel particles dispersed in alumina/epoxy composite matrix were prepared using a facile wet impregnation process. The influences of in situ formed alumina particles (i-Al 2 O 3 ) and epoxy on the dielectric properties of the composites were investigated in detail. For the composites with nickel contents far below the percolation threshold, the main electrical conduction mechanism is hopping conduction, and the main loss comes from polarizations. Therefore, the formation of alumina and epoxy result in higher permittivity but high loss due to the enhanced interfacial polarization. For the composites with nickel contents below but near the percolation threshold, the main electrical conduction mechanism is metal-like conduction and the main loss comes from eddy currents under high frequency electric field. Accordingly, the i-Al 2 O 3 and filled epoxy between nickel particles could bring both high permittivity and low loss. This paper experimentally shows how the characteristics of the interface between different phases influence the dielectric performances of composites. And the impregnation process is an effective strategy to obtain percolative metal/ceramic/polymer three-phase composites with ultralow metal content, high permittivity and low loss.

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Ultrahigh Energy Density of Polymer Nanocomposites Containing BaTiO₃@TiO₂ Nanofibers by Atomic‐Scale Interface Engineering

Cited by 530 publications

References 27 publications

Enhanced Energy Storage with Polar Vortices in Ferroelectric Nanocomposites

Enhanced Energy Storage with Polar Vortices in Ferroelectric Nanocomposites

High Discharge Energy Density at Low Electric Field Using an Aligned Titanium Dioxide/Lead Zirconate Titanate Nanowire Array

Ni/Al₂O₃/epoxy high-k composites with ultralow nickel content towards high-performance dielectric applications

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Ultrahigh Energy Density of Polymer Nanocomposites Containing BaTiO3@TiO2 Nanofibers by Atomic‐Scale Interface Engineering

Cited by 530 publications

References 27 publications

Enhanced Energy Storage with Polar Vortices in Ferroelectric Nanocomposites

Enhanced Energy Storage with Polar Vortices in Ferroelectric Nanocomposites

High Discharge Energy Density at Low Electric Field Using an Aligned Titanium Dioxide/Lead Zirconate Titanate Nanowire Array

Ni/Al2O3/epoxy high-k composites with ultralow nickel content towards high-performance dielectric applications

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Product

Resources

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Ultrahigh Energy Density of Polymer Nanocomposites Containing BaTiO₃@TiO₂ Nanofibers by Atomic‐Scale Interface Engineering

Ni/Al₂O₃/epoxy high-k composites with ultralow nickel content towards high-performance dielectric applications