High energy density, temperature stable lead-free ceramics by introducing high entropy perovskite oxide

Zhou, Shiyu; Pu, Yongping; Zhang, Xuqing; Shi, Weilong; Gao, Ziyan; Feng, Yu; Shen, Guodong; Wang, Xueyun; Wang, Dawei

doi:10.1016/j.cej.2021.131684

Cited by 143 publications

(49 citation statements)

References 67 publications

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“…Figure summarized the key parameters for energy storage from representative lead-free dielectric ceramics, including BNT-, BT-, BF-, NN-, and AN-based ceramics. − ,,,− ,− Obviously, the relaxor ferroelectric ceramics are much easier to simultaneously realize ultrahigh W rec and high η than antiferroelectric counterparts. Nevertheless, the W rec of most ceramics is lower than 10 J/cm 3 , which not only is inferior to the most of polymer-based capacitors but also may not meet the need for the future portable electronic devices.…”

Section: Resultsmentioning

confidence: 99%

Significantly Enhanced Energy Storage Performance of Lead-Free BiFeO₃-Based Ceramics via Synergic Optimization Strategy

Guan

Yan

et al. 2022

ACS Appl. Mater. Interfaces

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Owing to the merits of giant power density and ultrafast charge–discharge time, dielectric capacitors including ceramics and films have inspired increasing interest lately. Nevertheless, the energy storage density of dielectric ceramics should be further optimized to cater to the boosting demand for the compact and portable electronic devices. Herein, an ultrahigh recoverable energy storage density W rec of 13.44 J/cm3 and a high efficiency η of 90.14% are simultaneously realized in BiFeO3–BaTiO3–NaTaO3 relaxor ferroelectric ceramics with high polarization P max, reduced remanent polarization P r, and optimized electric breakdown strength E b. High P max originates from the genes of BiFeO3-based ceramics, and reduced P r is induced by enhanced relaxor behavior. Particularly, a large E b is achieved by the synergic contributions from complicated internal and external factors, such as decreased grain size and improved resistivity and electrical homogeneity. Furthermore, the ceramics also exhibit satisfactory frequency, cycling and thermal reliability, and decent charge–discharge property. This work not only indicates that the BiFeO3-based relaxor ferroelectric materials are promising choices for the next-generation electrostatic capacitors but also paves a potential approach to exploit novel high-performance dielectric ceramics.

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Section: Resultsmentioning

confidence: 99%

Significantly Enhanced Energy Storage Performance of Lead-Free BiFeO₃-Based Ceramics via Synergic Optimization Strategy

Guan

Yan

et al. 2022

ACS Appl. Mater. Interfaces

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“…Because of the high demand for energy and the rapid growth of microelectronic technology, the industry has focused heavily on the hunt for colossal permittivity (CP) materials of electrical and energy storage systems. − The research on colossal permittivity materials is mainly focused on BaTiO 3 , − SrTiO 3 , − CaCu 3 Ti 4 O 12 , − TiO 2 , − and NiO, − as shown in Figure . These materials have a high permittivity (>10 4 ).…”

Section: Introductionmentioning

confidence: 99%

Simultaneously Achieving Colossal Permittivity, Ultralow Dielectric Loss Tangent, and High Insulation Resistivity in Er-Doped SrTiO₃ Ceramics via Oxygen Vacancy Regulation

Zhang

et al. 2022

ACS Appl. Mater. Interfaces

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High-performance Sr1–x Er x TiO3 (x = 0–0.014) ceramics were sintered in different atmospheres using the conventional solid-state reaction method. The phase structure and micromorphology of ceramics were analyzed using X-ray diffraction and scanning electron microscopy. Meanwhile, the Sr1–x Er x TiO3 (when x = 0.012) ceramic sintered in hydrogen attains a colossal permittivity (132 543 @1 kHz, 157 650 @1 MHz) and ultralow tan δ (0.009 @1 kHz, 0.03 @1 MHz) and has good frequency stability (20 Hz to 2 MHz) and temperature stability (−180 to 425 °C). X-ray photoelectron spectroscopy, electron paramagnetic resonance, and impedance analysis show that the colossal permittivity and ultralow dielectric loss are attributed to the defect dipoles and defect clusters [TiTi ′–VO ••–TiTi ′], [ErSr •–TiTi ′], [2ErTi ′–VO ••], and [ErSr •–ErTi ′]. The insulation resistivity is determined by the grain boundary. The dielectric properties of samples sintered in hydrogen are excellent, and then, the oxidation method is used to backfill the oxygen vacancy (VO ••), thus improving the insulation resistivity (2.8 × 1014 Ω cm) of the grain boundary. In addition, the diffusion mechanism of ceramic VO •• from low, medium, and high temperatures was studied by monitoring VO •• behavior in real time. The results reveal that the diffusion coefficient of VO •• in the grain boundary is greater than that in the grain; as a result, as the external oxygen partial pressure rises, the VO •• escapes first from the grain boundary. When the external oxygen partial pressure decreases, oxygen atoms enter the grain boundary region first and backfill oxygen vacancies.

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“…Fig. 5 compares the vital parameters for dielectric energy storage between the recently reported Bi 0.5 Na 0.5 TiO 3 (BNT)-, 29–33 BaTiO 3 (BT)-, 6,7,34–36 (K 0.5 Na 0.5 )NbO 3 (KNN)-, 12,37–40 BiFeO 3 (BFO)-based 10,13–17,24,27,41,42 relaxor ferroelectric ceramics and our case. The detailed composition, as well as the values of E test / E b , W rec and η are listed in Table S3 †.…”

Section: Resultsmentioning

confidence: 85%

Simultaneous achievement of ultrahigh energy storage density and high efficiency in BiFeO₃-based relaxor ferroelectric ceramics via a highly disordered multicomponent design

et al. 2022

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High energy density, temperature stable lead-free ceramics by introducing high entropy perovskite oxide

Cited by 143 publications

References 67 publications

Significantly Enhanced Energy Storage Performance of Lead-Free BiFeO₃-Based Ceramics via Synergic Optimization Strategy

Significantly Enhanced Energy Storage Performance of Lead-Free BiFeO₃-Based Ceramics via Synergic Optimization Strategy

Simultaneously Achieving Colossal Permittivity, Ultralow Dielectric Loss Tangent, and High Insulation Resistivity in Er-Doped SrTiO₃ Ceramics via Oxygen Vacancy Regulation

Simultaneous achievement of ultrahigh energy storage density and high efficiency in BiFeO₃-based relaxor ferroelectric ceramics via a highly disordered multicomponent design

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High energy density, temperature stable lead-free ceramics by introducing high entropy perovskite oxide

Cited by 143 publications

References 67 publications

Significantly Enhanced Energy Storage Performance of Lead-Free BiFeO3-Based Ceramics via Synergic Optimization Strategy

Significantly Enhanced Energy Storage Performance of Lead-Free BiFeO3-Based Ceramics via Synergic Optimization Strategy

Simultaneously Achieving Colossal Permittivity, Ultralow Dielectric Loss Tangent, and High Insulation Resistivity in Er-Doped SrTiO3 Ceramics via Oxygen Vacancy Regulation

Simultaneous achievement of ultrahigh energy storage density and high efficiency in BiFeO3-based relaxor ferroelectric ceramics via a highly disordered multicomponent design

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Significantly Enhanced Energy Storage Performance of Lead-Free BiFeO₃-Based Ceramics via Synergic Optimization Strategy

Significantly Enhanced Energy Storage Performance of Lead-Free BiFeO₃-Based Ceramics via Synergic Optimization Strategy

Simultaneously Achieving Colossal Permittivity, Ultralow Dielectric Loss Tangent, and High Insulation Resistivity in Er-Doped SrTiO₃ Ceramics via Oxygen Vacancy Regulation

Simultaneous achievement of ultrahigh energy storage density and high efficiency in BiFeO₃-based relaxor ferroelectric ceramics via a highly disordered multicomponent design