Significantly enhanced energy storage density for poly(vinylidene fluoride) composites by induced PDA-coated 0.5Ba(Zr0.2Ti0.8)O3–0.5(Ba0.7Ca0.3)TiO3 nanofibers

Chi, Qingguo; Ma, Tao; Zhang, Yue; Cui, Yang; Zhang, Changhai; Lin, Jiaqi; Wang, Xuan; Liu, Qingquan

doi:10.1039/c7ta03897f

Cited by 187 publications

(88 citation statements)

References 53 publications

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“…It is therefore imperative to develop polymer dielectric materials with high energy density hence to miniaturize the size and weight of electrostatic capacitors. [1,9,10] Therefore, in order to make them as viable dielectrics for high energy density electrostatic capacitors, it is urgent to enhance the discharge efficiency of PVDF-based polymer nanocomposites. [4][5][6][7] Many kinds of polymers have been explored as polymer matrix, including epoxy, polydimethylsiloxane (PDMS), polyimides, etc.…”

Section: Introductionmentioning

confidence: 99%

Polymer Nanocomposites with Interpenetrating Gradient Structure Exhibiting Ultrahigh Discharge Efficiency and Energy Density

Jiang

Shen

Cai

et al. 2019

Advanced Energy Materials

148

114

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Poly(vinylidene fluoride) (PVDF) based polymer nanocomposites with high‐permittivity nanofillers exhibit outstanding dielectric energy storage performance due to their high dielectric permittivities and breakdown strength. However, their discharge efficiency is relatively low (usually lower than 70%), which limits their practical applications. Here, polymer nanocomposites with a novel interpenetrating gradient structure are designed and demonstrated by cofilling a PVDF matrix with barium zirconate titanate nanofibers and hexagonal boron nitride nanosheets via modified nonequilibrium processing. The interpenetrating gradient structure is highly effective in breaking the trade‐off between discharge energy density and efficiency of the corresponding nanocomposite, as indicated by the concomitantly enhanced discharge energy density (U e ≈ 23.4 J cm−3) and discharge efficiency (η ≈ 83%). The superior performance is primarily attributed to the rational distribution of nanofillers in the polymer matrix, which raises the height of the potential barrier for charge injection at the dielectric/electrode interface, suppresses electric conduction and contributes to enhanced apparent breakdown strength. Meanwhile, the gradient configuration allows higher volume fraction of high‐permittivity nanofillers without compromising the breakdown strength, leading to higher electric polarization compared with the random configuration. This work provides new opportunities to PVDF‐based polymer nanocomposites with high energy density and discharge efficiency for capacitive energy storage applications.

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Section: Introductionmentioning

confidence: 99%

Polymer Nanocomposites with Interpenetrating Gradient Structure Exhibiting Ultrahigh Discharge Efficiency and Energy Density

Jiang

Shen

Cai

et al. 2019

Advanced Energy Materials

148

114

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“…In this article, the copolymer of PVDF, poly(vinylidene fluoride‐hexafluoro propylene) (PVDF‐HFP), is selected as the matrix owing to its higher energy density than that of PVDF and P(VDF−TrFE) . For the choice of dielectric fillers, it is known that incorporating nanofillers with less difference in dielectric constant from the matrix would decline the distortion of electric field in the composites . Besides, considering the outstanding insulation performance of Al 2 O 3 , the surface charged gas‐phase Al 2 O 3 particles ( ε’ ≈ 10), which has been seldom reported in optimizing dielectric properties of ferroelectric polymers, were chosen as dielectric fillers.…”

Section: Introductionmentioning

confidence: 99%

Enhanced dielectric performance and energy storage of PVDF‐HFP‐based composites induced by surface charged Al₂O₃

Yin

Yang

et al. 2019

J Polym Sci B Polym Phys

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In order to enhance dielectric properties and energy storage density of poly(vinylidene fluoride‐hexafluoro propylene) (PVDF‐HFP), surface charged gas‐phase Al2O3 nanoparticles (GP‐Al2O3, with positive surface charges, ε’ ≈ 10) are selected as fillers to fabricate PVDF‐HFP‐based composites via simple physical blending and hot‐molding techniques. The results show that GP‐Al2O3 are dispersed homogeneously in the PVDF‐HFP matrix and the existence of nanoscale interface layer (matrix‐filler) is investigated by SAXS. The dielectric constant of the composites filled with 10 wt % GP‐Al2O3 is 100.5 at 1 Hz, which is 5.6 times higher than that of pure PVDF‐HFP. The maximum energy storage density of the composite is 4.06 J cm−3 at an electrical field of 900 kV mm−1 with GP‐Al2O3 content of 1 wt %. Experimental results show that GP‐Al2O3 could induce uniform fillers’ distribution and increase the concentration of electroactive β‐phase as well as enhance interfacial polarization in the matrix, which resulted in enhancements of dielectric constant and energy storage density of the PVDF‐HFP composites. This work demonstrates that surface charged inorganic‐oxide nanoparticles exhibit promising potential in fabricating ferroelectric polymer composites with relatively high dielectric constant and energy storage. © 2019 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2019, 57, 574–583

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“…And he proved that a certain amount of silane coupling agents improved the dielectric property. Chi used PDA to modify TiO 2 nanofibers, BaTiO 3 nanofibers, CaCu 3 Ti 4 O 12 nanofibers, and 0.5Ba(Zr 0.2 Ti 0.8 )O 3 ‐0.5(Ba 0.7 Ca 0.3 )TiO 3 nanofibers (BZT‐BCT NFs), which exhibited excellent dispersion and good compatibility with polyvinylidene fluoride (PVDF). And the BZT‐BCT NFs/PVDF composite possessed low loss, small leakage current, and excellent storage performance.…”

Section: Introductionmentioning

confidence: 99%

Dielectric property of modified barium titanate/polyamide 11 nanocomposites with different surfactants

Chen

Yang

et al. 2019

J of Applied Polymer Sci

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Barium titanate/polyamide 11 (BT/PA11) nanocomposites were prepared by modifying BT nanoparticles with dry surface modification process, which had well dispersion, high dielectric constant, and low dielectric loss. Various methods were reported to improve dispersion and compatibility with complex process and high cost. Herein, three surfactants [ γ‐aminopropyl triethoxy silane (KH550), sorbitan monostearate (SP60), and octadecyl phosphate ester (OPE)] were chosen to modify BT nanoparticles. Then modified‐BT nanoparticles were blended with PA11. The structure was characterized by Fourier transform infrared, scanning electron microscope, and wide angle X‐ray diffraction. Dielectric property was studied by broadband dielectric spectroscopy. The frequency dependence and temperature dependence of dielectric constant, dielectric loss, and dielectric modulus were analyzed. In general, dielectric property has strong frequency and temperature dependence. Furthermore, dielectric spectra shows that modified BT/PA11 nanocomposites have higher dielectric constant, lower dielectric loss, fewer interface polarization, and more dipole polarization. In contrast to three surfactants, OPE‐BT nanoparticles have better effects, whose dielectric constant increases from 19 to 28 at 1 Hz, and dielectric loss decreases from 0.36 to 0.23. Meanwhile, mechanical property was characterized by universal testing machine. In all, the work improves dispersion of BT nanoparticles and dielectric property with easy process and low cost. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47447.

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Significantly enhanced energy storage density for poly(vinylidene fluoride) composites by induced PDA-coated 0.5Ba(Zr_0.2Ti_0.8)O₃–0.5(Ba_0.7Ca_0.3)TiO₃ nanofibers

Abstract: The significantly enhanced energy storage characteristics of 0.5Ba(Zr0.2Ti0.8)O3–0.5(Ba0.7Ca0.3)TiO3 nanofibers/PVDF dielectric composites with low doping ratios and large aspect ratio nanofillers.

Cited by 187 publications

References 53 publications

Polymer Nanocomposites with Interpenetrating Gradient Structure Exhibiting Ultrahigh Discharge Efficiency and Energy Density

Polymer Nanocomposites with Interpenetrating Gradient Structure Exhibiting Ultrahigh Discharge Efficiency and Energy Density

Enhanced dielectric performance and energy storage of PVDF‐HFP‐based composites induced by surface charged Al₂O₃

Dielectric property of modified barium titanate/polyamide 11 nanocomposites with different surfactants

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Significantly enhanced energy storage density for poly(vinylidene fluoride) composites by induced PDA-coated 0.5Ba(Zr0.2Ti0.8)O3–0.5(Ba0.7Ca0.3)TiO3 nanofibers

Abstract: The significantly enhanced energy storage characteristics of 0.5Ba(Zr0.2Ti0.8)O3–0.5(Ba0.7Ca0.3)TiO3 nanofibers/PVDF dielectric composites with low doping ratios and large aspect ratio nanofillers.

Cited by 187 publications

References 53 publications

Polymer Nanocomposites with Interpenetrating Gradient Structure Exhibiting Ultrahigh Discharge Efficiency and Energy Density

Polymer Nanocomposites with Interpenetrating Gradient Structure Exhibiting Ultrahigh Discharge Efficiency and Energy Density

Enhanced dielectric performance and energy storage of PVDF‐HFP‐based composites induced by surface charged Al2O3

Dielectric property of modified barium titanate/polyamide 11 nanocomposites with different surfactants

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Significantly enhanced energy storage density for poly(vinylidene fluoride) composites by induced PDA-coated 0.5Ba(Zr_0.2Ti_0.8)O₃–0.5(Ba_0.7Ca_0.3)TiO₃ nanofibers

Enhanced dielectric performance and energy storage of PVDF‐HFP‐based composites induced by surface charged Al₂O₃