Enhanced energy storage density by inducing defect dipoles in lead free relaxor ferroelectric BaTiO3-based ceramics

Li, Wenbo; Zhou, Di; Pang, Li‐Xia

doi:10.1063/1.4979467

Cited by 142 publications

(90 citation statements)

References 26 publications

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“…It has been reported that the dielectric breakdown strength dominates the energy performance in ferroelectric materials compared to the dielectric permittivity, especially under an ultrahigh electric field from the experimental aspect . Furthermore, the energy storage efficiency is considered one of the most important indicators of ferroelectric energy storage ceramics, which is why relaxor ferroelectric ceramics are attracting increasingly more attention in applications of energy storage devices . Such energy storage densities can be easily calculated from electric hysteresis loops.…”

Section: Introductionmentioning

confidence: 99%

Grain‐size–dependent dielectric properties in nanograin ferroelectrics

et al. 2018

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A series of ferroelectric ceramic models with grain and grain‐boundary structures of different sizes are established via Voronoi tessellations. A phase‐field model is introduced to study the dielectric breakdown strength of these ferroelectric ceramics. Afterward, the relation between the electric displacement and electric field and the hysteresis loop are calculated using a finite element method based on a classical and modified hyperbolic tangent model. The results indicate that as the grain size decreases, the dielectric strength is enhanced, but the dielectric permittivity is reduced. The discharge energy density and energy storage efficiency of these ferroelectric ceramics extracted from the as‐calculated hysteresis both increase along with a decrease in their grain size at their breakdown points. However, under the same applied electric field, the ferroelectric ceramic with a smaller grain size possesses a lower discharge energy density but a higher energy storage efficiency. The results suggest that ferroelectric ceramics with smaller grain sizes possess advantages for applications in energy storage devices.

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Section: Introductionmentioning

confidence: 99%

Grain‐size–dependent dielectric properties in nanograin ferroelectrics

et al. 2018

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“…High permittivity and high breakdown strength (BDS) were the key problems of enhancing the energy density. The BaTiO 3 ‐based ceramics had been studied for decades in the pulsed‐power capacitors applications . As developments of various modifications with different elements, BaTiO 3 ‐BiM'O x (M’=Sc, Al, Y, Gd, Yb, Nb, etc.)…”

Section: Introductionmentioning

confidence: 99%

“…The BaTiO 3 -based ceramics had been studied for decades in the pulsed-power capacitors applications. 7,8 As developments of various modifications with different elements, BaTiO 3 -BiM'O x (M'=Sc, [9][10][11] Al, 12 Y, 13 Gd, 14 Yb, 15 Nb, 16 etc.) ceramics were considered as potential candidates, which possessed large saturated polarization (P s ), small remnant polarization (P r ), and moderate BDS.…”

Section: Introductionmentioning

confidence: 99%

Effect of BiNbO₄ doping on the dielectric properties of BaTiO₃ ceramics

Wei

Zhang

et al. 2017

Int J Applied Ceramic Tech

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In this paper, the effect of BiNbO 4 doping on the structural characteristics and dielectric properties were investigated systematically. With the increase in the BiNbO 4 content, a systematic structural characteristics change from ferroelectric tetragonal to cubic phase. Dielectric properties changed from classical ferroelectric behavior to dispersive relaxor-like behavior, further to linear behavior. Because of the created defect dipoles, the long-range dipolar interaction was interrupted and the weak couplings were formed. Energy storage density reached the maximum of 0.797 J/cm 3 with energy efficiency of 92.5% in 0.9BT-0.1BN. The nonlinearity was suppressed obviously, which could enhance the energy storage density in lead-free relaxor materials.capacitors, co-doping, dielectric properties, energy density, nonlinearity | INTRODUCTIONThe pulse power capacitors were used in many applications, such as laser weapons, high-power microwave systems and other power systems, 1-6 which needed to release all the stored energy in microseconds. High permittivity and high breakdown strength (BDS) were the key problems of enhancing the energy density. The BaTiO 3 -based ceramics had been studied for decades in the pulsed-power capacitors applications. was well known as the high permittivity-and temperaturestability. Nb was used to adjust the Curie temperature near the room temperature. Besides, BiNbO 4 was a good microwave dielectric material with low dielectric loss. 20,21 However, few people study the mechanism of simultaneous increase in dielectric constant and linearity.As we all know, larger polarization, smaller P r , relative low nonlinearity, higher energy efficiency, and higher BDS were the determining factors in lead-free relaxor materials for the energy storage applications. However, few paid attention to the dielectric properties beyond the solid solubility. In this paper, the properties of BaTiO 3 with Bi 2 O 3 and Nb 2 O 5 co-doped in a wide range were investigated systematically. The idea was to form weakly coupled relaxor polarization and adjust the Curie temperature with Bi 2 O 3 -Nb 2 O 5 co-doped for reducing the P r.9-11,13-15 And beyond the solid solubility, the formed second phase led to suppress the nonlinearity for improving the energy density. The mechanisms of maintaining high permittivity and suppressing the nonlinearity were investigated systematically.

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“…It is also reported that Mn ions with a low valence state are expected to exist or coexist after sintering at temperatures above 1000°C because the Mn ions possess various valence states at different temperatures: MnO 2 (<535°C), Mn 2 O 3 (<1080°C), Mn 3 O 4 (<1650°C) and MnO (>1650°C) . In addition, it is also reported that Mn is always used to optimize the polarization‐electric field hysteresis loops ( P ‐ E loops) and reduce the leakage current in ferroelectric ceramics . To investigate the relationship between the structure variation and energy‐storage properties, we doped the multivalent element Mn into the (Pb 0.93 Ba 0.04 La 0.02 )(Zr 0.65 Sn 0.3 Ti 0.05 )O 3 (PBLZST) AFE ceramics.…”

Section: Introductionmentioning

confidence: 99%

Structure variation and energy storage properties of acceptor‐modified PBLZST antiferroelectric ceramics

Zhang

Zhu

et al. 2018

J Am Ceram Soc

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Energy storage capacitors with high recoverable energy density and efficiency are greatly desired in pulse power system. In this study, the energy density and efficiency were enhanced in Mn‐modified (Pb0.93Ba0.04La0.02)(Zr0.65Sn0.3Ti0.05)O3 antiferroelectric ceramics via a conventional solid‐state reaction process. The improvement was attributed to the change in the antiferroelectric‐to‐ferroelectric phase transition electric field (EF) and the ferroelectric‐to‐antiferroelectric phase transition electric field (EA) with a small Mn addition. Mn ions as acceptors, which gave rise to the structure variation, significantly influenced the microstructures, dielectric properties and energy storage performance of the antiferroelectric ceramics. A maximum recoverable energy density of 2.64 J/cm3 with an efficiency of 73% was achieved when x = 0.005, which was 40% higher than that (1.84 J/cm3, 68%) of the pure ceramic counterparts. The results demonstrate that the acceptor modification is an effective way to improve the energy storage density and efficiency of antiferroelectric ceramics by inducing a structure variation and the (Pb0.93Ba0.04La0.02)(Zr0.65Sn0.3Ti0.05)O3‐xMn2O3 antiferroelectric ceramics are a promising energy storage material with high‐power density.

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Enhanced energy storage density by inducing defect dipoles in lead free relaxor ferroelectric BaTiO3-based ceramics

Cited by 142 publications

References 26 publications

Grain‐size–dependent dielectric properties in nanograin ferroelectrics

Grain‐size–dependent dielectric properties in nanograin ferroelectrics

Effect of BiNbO₄ doping on the dielectric properties of BaTiO₃ ceramics

Structure variation and energy storage properties of acceptor‐modified PBLZST antiferroelectric ceramics

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Enhanced energy storage density by inducing defect dipoles in lead free relaxor ferroelectric BaTiO3-based ceramics

Cited by 142 publications

References 26 publications

Grain‐size–dependent dielectric properties in nanograin ferroelectrics

Grain‐size–dependent dielectric properties in nanograin ferroelectrics

Effect of BiNbO4 doping on the dielectric properties of BaTiO3 ceramics

Structure variation and energy storage properties of acceptor‐modified PBLZST antiferroelectric ceramics

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Effect of BiNbO₄ doping on the dielectric properties of BaTiO₃ ceramics