Improvement of the recoverable energy storage density and efficiency by utilizing the linear dielectric response in ferroelectric capacitors

Peng, Bin; Xie, Zhenkun; Yue, Zhenxing; Li, Longtu

doi:10.1063/1.4892454

Cited by 59 publications

(38 citation statements)

References 21 publications

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“…The energy densities and efficiency of the BFSTO films are compared with those of representative lead-based and lead-free material systems reported previously, as displayed in Fig. 3c 10–12,28–33 . The results evidently show that the energy densities of the BFSTO films are superior to those of other reported lead-free systems (35% over the best BTO-based systems 12 ) and rival the lead-based materials.…”

Section: Resultsmentioning

confidence: 99%

“…a Discharged energy density and b efficiency of the BFSTO films as a function of the applied electric field. c Comparisons of energy density and efficiency between BFSTO and representative dielectric systems 10–12,28–33 , showing that the BFSTO films possess the most outstanding energy storage performance. d Energy density and efficiency for x = 0.60 and 0.75 at an electric field of 2.5 MV cm −1 over 1 × 10 7 charging-discharging cycles.…”

Section: Resultsmentioning

confidence: 99%

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Giant energy density and high efficiency achieved in bismuth ferrite-based film capacitors via domain engineering

et al. 2018

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Developing high-performance film dielectrics for capacitive energy storage has been a great challenge for modern electrical devices. Despite good results obtained in lead titanate-based dielectrics, lead-free alternatives are strongly desirable due to environmental concerns. Here we demonstrate that giant energy densities of ~70 J cm−3, together with high efficiency as well as excellent cycling and thermal stability, can be achieved in lead-free bismuth ferrite-strontium titanate solid-solution films through domain engineering. It is revealed that the incorporation of strontium titanate transforms the ferroelectric micro-domains of bismuth ferrite into highly-dynamic polar nano-regions, resulting in a ferroelectric to relaxor-ferroelectric transition with concurrently improved energy density and efficiency. Additionally, the introduction of strontium titanate greatly improves the electrical insulation and breakdown strength of the films by suppressing the formation of oxygen vacancies. This work opens up a feasible and propagable route, i.e., domain engineering, to systematically develop new lead-free dielectrics for energy storage.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Giant energy density and high efficiency achieved in bismuth ferrite-based film capacitors via domain engineering

et al. 2018

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“…The energy storage performance of the samples in this study can be expressed by (η, W rev ), for example, (81.3%, 63.7) has been obtained for PZT/AO/PZT opposite double‐heterojunction annealed at 550 °C. The comparison diagram of the energy storage performance is given in Figure for the representative thin films materials, such as polymer thin films, lead‐based thin films, lead‐free thin films . It can be observed that it is difficult to obtain high energy storage density and high efficiency simultaneously.…”

Section: Resultsmentioning

confidence: 99%

High Energy Storage Performance of Opposite Double‐Heterojunction Ferroelectricity–Insulators

Zhang

Zhao

et al. 2018

Adv Funct Materials

127

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In this study, the excellent energy storage performance is achieved by constructing opposite double-heterojunction ferroelectricity-insulator-ferroelectricity configuration. The PbZr 0.52 Ti 0.48 O 3 films and Al 2 O 3 films are chosen as the ferroelectricity and insulator, respectively. The microstructures, polarization behaviors, breakdown strength, leakage current density, and energy storage performance are investigated systematically of the constructed PbZr 0.52 Ti 0.48 O 3 /Al 2 O 3 /PbZr 0.52 Ti 0.48 O 3 opposite double-heterojunction. The ultrahigh electric field breakdown strength (≈5711 kV cm −1 ) is obtained, which is beneficial to achieve high energy storage density. Meanwhile, the high linearity of hysteresis loops with low energy dissipation is obtained at a proper annealing temperature, which is induced by partially crystallized and is in favor of achieving high energy storage efficiency η. The PbZr 0.52 Ti 0.48 O 3 / Al 2 O 3 /PbZr 0.52 Ti 0.48 O 3 annealed at 550 °C exhibits excellent energy storage performance with a storage density of 63.7 J cm −3 and efficiency of 81.3%, which is ascribed to the synergetic effect of electric breakdown strength (E BDS = 5711 kV cm −1 ) and the polarization (P m -P r = 23.74 µC cm −2 ). The proposed method in this study opens a new door to improve the energy storage performance of inorganic ferroelectric capacitors. Keywords breakdown strength, energy storage, heterojunctions, polarization behavior

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“…In principle, the energy storage density ( W ) of dielectrics is determined by the integral of the applied electric field ( E ) with respect to the electric displacement ( D ) as

W = \int E d D

. Ferroelectric ceramics, which intrinsically possess high polarization, have nowadays been explored as high‐energy‐density candidates, while it is still challenging in terms of the reduction of energy loss and also the enhancement of ultimate breakdown strength. It is commonly accepted that dielectric breakdown is strongly microstructure dependent, and large endeavors have been made regarding the improvement of microstructure through the enhancement of processing technologies .…”

Section: Introductionmentioning

confidence: 99%

Enhanced Energy Density in Core–Shell Ferroelectric Ceramics: Modeling and Practical Conclusions

Wang

2015

J. Am. Ceram. Soc.

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A microstructure‐level model of the core–shell‐structured ferroelectric ceramics was developed through the voronoi tessellation random construction routine. Assuming the shell is linear dielectric and parameterizing the ferroelectric core with a classical and a modified hyperbolic tangent model, finite element method was applied to solve the resulting systems. Statistics of electric field spatial distribution indicate that increasing applied electric field leads to intensified field fluctuation while this effect is weakened through the incorporation with thicker shell. Energy density extracted from the as‐calculated hysteresis loops possesses an optimal value with regard to the shell fraction. Calculation results show that enhancing the saturation polarization and lowering the remnant polarization of the core, as well as modulating the shell fraction within a favorable range, provide the most effective way to obtain high‐energy‐density ceramics. Reducing the core initial and the shell permittivity benefits the energy efficiency. The underlying mechanisms of the enhanced energy density and reduced energy loss in the core–shell ferroelectric ceramics were discovered to be the trade‐offs between the lowered polarization and the weakened dielectric nonlinearity as a consequence of the dilution and depolarization of the shell. This model can guide the engineering of core–shell‐structured ferroelectric ceramics for energy storage.

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Improvement of the recoverable energy storage density and efficiency by utilizing the linear dielectric response in ferroelectric capacitors

Cited by 59 publications

References 21 publications

Giant energy density and high efficiency achieved in bismuth ferrite-based film capacitors via domain engineering

Giant energy density and high efficiency achieved in bismuth ferrite-based film capacitors via domain engineering

High Energy Storage Performance of Opposite Double‐Heterojunction Ferroelectricity–Insulators

Enhanced Energy Density in Core–Shell Ferroelectric Ceramics: Modeling and Practical Conclusions

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