Fig. 1. Schematic illustration of ferroelectrics enhanced electrochemical energy storage systems. 2. Fundamentals of ferroelectric materials. From the viewpoint of crystallography, a ferroelectric should adopt one of the following ten polar point groups—C 1, C s, C 2, C 2v, C 3, C 3v, C 4, C 4v, C 6 and C 6v, out of the 32 point groups. [ 14]
Read Morestorage. In paraelectric phase, polarization is zero and the dielectric constant is not zero (following the Curie–Weiss law) in absence of E, the origination of dielectric constant arises due to the vibration mode without contribution to energy storage, and in ferroelectric
Read MoreA major advantage of using a ferroelectric relaxor is the gain of energy conversion efficiency by undergoing the sluggish transition over a temperature range from a coexistence of ordered and disordered regions into a purely disordered one. Pan et al. use BiFeO 3-BaTiO 3 as a model system due to its robust ferroelectricity and high saturated
Read MoreThe polarization response of antiferroelectrics to electric fields is such that the materials can store large energy densities, which makes them promising candidates
Read MoreIn this work, leveraging phase‐field simulations, we judiciously designed a novel lead‐free relaxor ferroelectric material for enhanced energy storage
Read MoreDielectric capacitors are emerging energy-storage components that require both high energy-storage density and high efficiency. The conventional approach to energy-storage enhancement is polar nanodomain engineering via chemical modification. Here, a new approach of domain engineering is proposed by exploiting the tunable polar
Read MoreSpecifically, using high-throughput second-principles calculations, we engineer PbTiO3/SrTiO3 superlattices to optimize their energy storage performance at room temperature (to maximize density
Read MoreAdvances in flexible electronics are driving the development of ferroelectric thin-film capacitors toward flexibility and high energy storage performance. In the present work, the synergistic combination of mechanical bending and defect dipole engineering is
Read MoreThe ferroelectric to paraelectric phase transition in ${mathrm{LiTaO}}_{3}$ and in pure as well as Mg-doped ${mathrm{LiNbO}}_{3}$ is investigated theoretically by atomistic calculations in the framework of the density functional theory, as well as experimentally by calorimetry and electrical conductivity
Read MoreThis thermochromism corresponds to the color change from yellow (ferroelectric phase) to red (paraelectric phase) due to the deformation of CuCl 4 2− tetrahedra (Fig. 9 d). Ferroelectric behavior was confirmed by observing a hysteresis loop from P – E measurement at 353 K in the lower temperature phase with a spontaneous
Read Morea) Energy‐storage density and b) efficiency of trilayers as functions of strain and m in 2D models. c) Comparison of energy‐storage performance of trilayer (13/13/13) based on 2D and 3D models.
Read MoreThe ferroelectric phase was induced as the composition x increased from 0 to 0.08, however, which was not stable and transformed into AFE state upon heating, and then paraelectric phase, which was confirmed by
Read MoreAbstract. Compact autonomous ultrahigh power density energy storage and power generation devices that exploit the spontaneous polarization of ferroelectric materials are capable of producing hundreds of kilovolt voltages, multi-kiloampere currents, and megawatt power levels for brief interval of time.
Read MoreLa substitution led to the ferroelectric–paraelectric phase transition accompanying abrupt changes of Raman scattering spectra in Bi0.8La0.2FeO3 and Bi0.75La0.25FeO3, besides the release of weak
Read MoreFerroelectric to paraelectric phase transitions were visible in all of the compositions. Figure 5 illustrates how the dielectric constant for a particular batch of 15BaTiO 3 –65V 2 O 5 –20PbO GC nanocrystals varies with
Read MoreLead-free perovskite dielectric materials for storing electrical energy have been widely investigated due to their high polarization and reversible phase. However, their low electric resistivity limits the energy density and stability. In this study, the (1-x)(0.7BiFeO 3-0.3BaTiO 3)-xNaNbO 3 ceramics (x = 0 – 0.2) were prepared using two sintering
Read MoreAntiferroelectrics are of interest due to their high potential for energy storage. Here, we report the discovery of pinched, polarization-vs.-electric field ( P–E)
Read MoreAntiferroelectric NaNbO3 ceramics are potential candidates for pulsed power applications, but their energy efficiency and energy densities are low owing to the irreversible transition of NaNbO3 from antiferroelectric to electric field-induced ferroelectric phases. (Sr0.55Bi0.3)(Ni1/3Nb2/3)O3 was doped into NaNbO3 ceramics to modify their
Read MoreSpecifically, using high-throughput second-principles calculations, we engineer PbTiO 3 /SrTiO 3 superlattices to optimize their energy-storage performance
Read MoreAlthough the conventional knowledge considers that the ferroelectric-paraelectric phase transition of PTO has the energy storage properties of ferroelectric nanocomposites greatly depend on
Read MoreNot all applications, however, require normal ferroelectricity. There are quite a few applications requiring not rectangular-shaped but slim hysteresis loops with a minimum P r our recent report [15], it is indicated that both relaxor ferroelectric and antiferroelectric-like behaviors show narrow hysteresis loops with a minimum P r (see
Read More[32-35] With increasing substitution of Ba by Sr, there is a phase transition from ferroelectric to relaxor-ferroelectric and further to a paraelectric phase in the
Read MoreHigh-performance lead-free piezoelectric materials have become a hot topic in the field of advanced functional materials. In 2009, the (1 − x)Ba(Zr0.2Ti0.8)O3–x(Ba0.7Ca0.3)TiO3 (BZT–BCT) system with surprisingly high piezoelectric properties was first proposed by Liu and Ren; as a milestone discovery in the
Read MoreVarious switching dynamics are realized in these polar topologies, resulting in relaxor-ferroelectric-, antiferroelectric-, and paraelectric-like polarization behaviors, respectively. Ultrahigh energy-storage densities above
Read MoreSpecifically, using high-throughput second-principles calculations, we engineer PbTiO3/SrTiO3 superlattices to optimize their energy storage performance at room tempera-ture (to maximize density and release efficiency) with respect to different design variables (layer thicknesses, epitaxial conditions, and stiffness of the dielectric layer).
Read MoreThe paraelectric (PE) to ferroelectric (FE) phase transition in the model ferroelectric BaTiO 3 R. D. Fine phase mixtures as minimizers of energy. Archive for Rational Mechanics and Analysis
Read MoreFerroelectricity. Ferroelectricity is a characteristic of certain materials that have a spontaneous electric polarization that can be reversed by the application of an external electric field. [1] [2] All ferroelectrics are also piezoelectric and pyroelectric, with the additional property that their natural electrical polarization is reversible.
Read MoreDielectric ceramic capacitors are highly regarded for their rapid charge–discharge, high power density, and cyclability in various advanced applications. However, their relatively low energy storage density has prompted intensive research aiming at developing materials with a higher energy density. To enhance energy
Read MoreRecently, relaxor ferroelectrics characterized by nanodomains have shown great promise as dielectrics with high energy
Read MoreThe conventional method for increasing energy storage capacity involves polarization engineering through chemical alterations. In this study, we propose a new approach based on domain engineering by exploiting polarization vortices embedded in
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