Journal ArticleDOI
Enhanced dielectric properties of BaTiO3/poly(vinylidene fluoride) nanocomposites for energy storage applications
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TLDR
In this article, homogeneous ceramics-polymer nanocomposites consisting of surface treated BaTiO3 (BT) particles as fillers and poly(vinylidene fluoride) polymer as matrix have been prepared using a solution casting process.Abstract:
In this work, homogeneous ceramics-polymer nanocomposites consisting of surface treated BaTiO3 (BT) particles as fillers and poly(vinylidene fluoride) polymer as matrix have been prepared using a solution casting process. The nanocomposites exhibit enhanced dielectric permittivity and reduced loss tangent. The frequency and temperature dependencies of the dielectric permittivity and loss tangent of the nanocomposites suggest that the introduced BT phase and interface areas contribute to the improvement of the dielectric responses. Meanwhile, the X-ray diffraction patterns and Differential Scanning Calorimetry (DSC) curves indicate that the incorporation of ceramic particles contributes to the decrease of the crystallite size, the increase of the crystallinity, and the shift of the crystallization temperature of the polymer matrix. Furthermore, the dielectric displacement and energy density of the nanocomposites are significantly enhanced and an energy density of 3.54 J/cm3 was obtained under an electric field of 200 MV/m with the BT concentration of 20 vol. %. The results indicate that the introduced ceramic fillers and interface areas have positive influences on the structure of the polymer matrix and contribute to the enhancement of the dielectric responses and energy storage properties of the nanocomposites.read more
Citations
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Journal ArticleDOI
Recent Progress on Ferroelectric Polymer-Based Nanocomposites for High Energy Density Capacitors: Synthesis, Dielectric Properties, and Future Aspects.
TL;DR: This Review presents a comprehensive review of the use of ferroelectric polymers, especially PVDF and PVDF-based copolymers/blends as potential components in dielectric nanocomposite materials for high energy density capacitor applications.
Journal ArticleDOI
A review on the dielectric materials for high energy-storage application
TL;DR: In this paper, the state-of-the-art progress on electric energy-storage performance in dielectric materials is summarized, and some general future prospects are also provided from the existed theoretical and experimental results in this work.
Journal ArticleDOI
Significantly Enhanced Breakdown Strength and Energy Density in Sandwich-Structured Barium Titanate/Poly(vinylidene fluoride) Nanocomposites.
TL;DR: Sandwich-structured BaTiO3 /poly(vinylidene fluoride) (PVDF) nanocomposites are successfully prepared by the solution-casting method layer by layer and possess both high breakdown strength and large dielectric polarization simultaneously.
Journal ArticleDOI
Fabrication, characterization, properties and theoretical analysis of ceramic/PVDF composite flexible films with high dielectric constant and low dielectric loss
TL;DR: In this paper, the composite flexible films based on dopamine@BCZT and polyvinylidene fluoride were fabricated via a solution casting method, and the microstructure and morphology were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, high-resolution transmission electron microscopy, and field emission scanning electron microscope.
Journal ArticleDOI
Improving Dielectric Properties of PVDF Composites by Employing Surface Modified Strong Polarized BaTiO₃ Particles Derived by Molten Salt Method.
TL;DR: This work suggested that introduction of strong polarized ferroelectric particles with optimal size and construction of core-shell structured coated fillers by PVP in the PVDF matrix are efficacious in improving dielectric performance of composites.
References
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TL;DR: A contribution to the theory of electrocapillarity is given in this paper, where it is shown that the theory can be applied to the field of electrochemysics as well as physics.
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A Dielectric Polymer with High Electric Energy Density and Fast Discharge Speed
TL;DR: It is demonstrated that a very high energy density with fast discharge speed and low loss can be obtained in defect-modified poly(vinylidene fluoride) polymers by combining nonpolar and polar molecular structural changes of the polymer with the proper dielectric constants.
Journal ArticleDOI
Effect of crystallization temperature on the crystalline phase content and morphology of poly(vinylidene fluoride)
Rinaldo Gregorio,Marcelo Cestari +1 more
TL;DR: In this article, the effect of temperature on the crystallization of α, β, and γ phases of PVDF from dimethylacetamide (DMA) solution was studied, and the variation in the crystallinity content of these three phases was obtained as a function of temperature using infrared spectroscopy, differential scanning calorimetry (DSC), and x-ray diffraction techniques.
Journal ArticleDOI
Origin of apparent colossal dielectric constants
Peter Lunkenheimer,Vid Bobnar,Vid Bobnar,A. V. Pronin,A. V. Pronin,A. I. Ritus,A. A. Volkov,Alois Loidl +7 more
TL;DR: In this article, it was shown that the largest intrinsic dielectric constant observed so far in nonferroelectric materials is of order 10 − 2 − 2, which can be explained by depletion layers at the interface between sample and contacts or at grain boundaries.