Achieving high energy storage performance below 200 kV/cm in BaTiO3-based medium-entropy ceramics

Ning, Yating; Pu, Yongping; Wu, Chunhui; Zhang, Jinbo; Zhang, Xian; Shang, Yangchao

doi:10.1016/j.ceramint.2023.03.156

Cited by 22 publications

(5 citation statements)

References 39 publications

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“…This suggests that, in contrast to SMN or SZT, SMZTN will affect solid solutions with BF-BT differently. Goldschmidt tolerance factor ( t ), as demonstrated by earlier research, is a crucial value in the development of intricate perovskite structures . The fluctuation of configurational entropy and computed t for SMZTN -x ceramics is plotted in Figure b.…”

Section: Resultsmentioning

confidence: 99%

“…The performance of energy storage is improved, and relaxor qualities are introduced when a high entropy is introduced into ceramic solid solutions. ,− On the contrary, the coexistence of several components might quickly lead to the formation of an impurity phase. The SMZTN- x powders and ceramics were manufactured between 800 and 980 °C to confirm the B-site multielement potential coexistence.…”

Section: Resultsmentioning

confidence: 99%

“…Interestingly, at 190 kV/cm, a marked comprehensive performance with a high η value (75%) and a high W rec (2.4 J/cm 3 ) is obtained for SMZTN-0.08 lead-free ceramics. To further investigate the performance of SMZTN-modified BT-BF ceramics, lead-free bulk ceramics that have already been published (BT-BF-based, ,,− ,,,− BaTiO 3 -based, ,,,,, (K 0.5 Na 0.5 )NbO 3 -based, ,− Bi 0.5 Na 0.5 TiO 3 -based ,− ) were compared in terms of their W rec and η below 200 kV/cm and under the critical electric field. The majority of lead-free ceramics, as illustrated in Figures f and S5, have low W rec , and it is challenging to obtain a combination of high η and low W rec .…”

Section: Resultsmentioning

confidence: 99%

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High-Entropy Strategy for Improved Mechanical and Energy Storage Properties in BaTiO₃–BiFeO₃-Based Ceramics

Chen,

Wang,

Xie

et al. 2024

ACS Appl. Mater. Interfaces

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Dielectric capacitors are employed extensively due to their exceptional performance, including a rapid charge−discharge speed and superior power density. However, their practical implementation is hindered by constraints in energy-storage density (ESD), efficiency (ESE), and thermal stability. To achieve domain engineering and improved relaxor behavior in 0.67BiFeO 3 -0.33BaTiO 3 -based Pb-free ceramics, the concerns have been addressed here by employing a synergistic high-entropy strategy involving the design of the composition of Sr(Mg 1/6 Zn 1/6 Ta 1/3 Nb 1/3 )O 3 with B-site multielement coexistence and high configuration entropy. Remarkably, in (0.67-x)BiFeO 3 -0.33BaTiO 3 -xSr(Mg 1/6 Zn 1/6 Ta 1/3 Nb 1/3 )O 3 ceramics with x = 0.08, a good ESE (η) of 75% and a recoverable ESD (W rec ) of 2.4 J/cm 3 at 190 kV/cm were attained together with an ultrahigh hardness of ∼7.2 GPa. The high-entropy strategy, which is tailored by an increase in configuration entropy, can be attributed to the superior mechanical and ES properties. It also explains the enhanced random field and relaxation behavior, the structural coexistence of ferroelectric rhombohedral (R3c) and nonpolar pseudocubic (Pm-3m) symmetries, the decreased domain size, and evenly distributed polar nanoregions (PNRs). Moreover, improved thermal stability and outstanding frequency stability are also obtained. By boosting the configuration entropy, BiFeO 3 −BaTiO 3 materials dramatically improved their complete energy storage performance. This suggests that designing high-performance dielectrics with high entropy can be a convenient yet effective technique, leading to the development of advanced capacitors.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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High-Entropy Strategy for Improved Mechanical and Energy Storage Properties in BaTiO₃–BiFeO₃-Based Ceramics

Chen,

Wang,

Xie

et al. 2024

ACS Appl. Mater. Interfaces

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“…The strengthened relaxation behavior is related to chemical disorder induced by the difference in valence state and ionic radius, which can enhances local random electric field and local stress, thereby disrupt long-range ordering and produce some polar nano region, then energy storage characteristics can be expected to be improved. 35 Figure 4a exhibits the hysteresis loop (P-E) of the (1-x)BNNT-xBZMASZ ceramics at 200 kV cm −1 under room temperature. With x increasing, the P-E curve becomes thinner toward a linear shape, suggesting a gradual disruption of the long-range ferroelectric ordering and a notable improvement in the relaxation properties.…”

Section: Resultsmentioning

confidence: 99%

Enhancement of Charge-Discharge Properties and Temperature Stability of (Ba_0.975Na_0.05)Ti_0.99Nb_0.01O₃ Ceramic by Doping High-Entropy Oxide

Bian,

Liu,

et al. 2024

ECS J. Solid State Sci. Technol.

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A bidirectional optimization strategy was adopted to fabricate (1-x)(Ba0.975Na0.05)Ti0.99Nb0.01O3)-xBi(Zn0.2Mg0.2Al0.2Sn0.2Zr0.2)O3(abbreviated as (1-x)BNNT-xBZMASZ, x = 0.02–0.10) ceramics, aimed to improve the energy storage performance. X-ray diffraction results revealed that Bi2+ cations entered the A site and the multiple cations occupied the B site of BNNT, thereby decreased the remnant polarization intensity and refined the hysteresis loop. Scanning electron microscopy images showed uniform morphologies with clear grain boundaries of the ceramics, and the average size decreased with x increasing. The substitution of multiple cations at the B-site induced the splitting of macroscopic ferroelectric domains into smaller polar nanodomains, leading to the formation of high-dynamic polar nanoregions and accelerating the transition from BNNT to relaxor ferroelectrics, thus improving relaxation properties of the material. The excellent energy storage density (Wrec ∼ 2.80 J cm−3) and efficiency (∼90.0%) can be obtained under 200 kV cm−1. Moreover, the discharge-charge testing revealed excellent current density (∼589.5 A cm−2), high power density (∼20.63 MW cm−2), and extremely short discharge time (t0.9 ∼ 50.4 ns), along with exceptional temperature stability and cycling stability under the equivalent electric field of 120 kV cm−1. The 0.92BNNT-0.08BZMASZ ceramic offers a new approach to the design and an improvement of pulsed dielectric capacitor materials.

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“…We calculated and fitted the full width at half maxima (FWHM) value of the XRD diffraction peak, as seen in Figure 2. The FWHM value (the data below the figure; the green line) gradually decreases with the increase in sintering temperature and has a minimum value of 1250 • C [16]. According to the Bragg diffraction equation, the value of the FWHM is directly related to the crystallinity, and a smaller FWHM means a stronger crystallinity [17,18].…”

Section: Effect Of Sc Ion Doping On Sintering Temperaturementioning

confidence: 98%

Effect of A- or B-Site Sc Doping on Sintering Temperature, Crystal Structure, Microstructure, and Properties of BaZrxTi1−xO3 Ceramics

Zhang,

Li,

2023

Materials

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BaZrxTi1−xO3 (BZT) ceramics with different concentrations of Sc ions were prepared, and the effect of doping concentration on the crystal substitution type of BZT was studied. The substitution position of the Sc ion in BZT was related to its concentration. When the concentration of Sc ions was low (<1.0 mol %), it showed B-site substitution; otherwise, Sc ions showed A-site substitution. In addition, the effects of the Sc ion concentration on the sintering temperature, crystal structure, microstructure, and properties of BZT were also studied. The results showed that the introduction of Sc ions can reduce the sintering temperature to 1250 °C. When the concentration of Sc ions was 1.0 mol % and 2.0 mol %, the high dielectric constants of BZT were 14,273 and 12,747, respectively.

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Achieving high energy storage performance below 200 kV/cm in BaTiO3-based medium-entropy ceramics

Cited by 22 publications

References 39 publications

High-Entropy Strategy for Improved Mechanical and Energy Storage Properties in BaTiO₃–BiFeO₃-Based Ceramics

High-Entropy Strategy for Improved Mechanical and Energy Storage Properties in BaTiO₃–BiFeO₃-Based Ceramics

Enhancement of Charge-Discharge Properties and Temperature Stability of (Ba_0.975Na_0.05)Ti_0.99Nb_0.01O₃ Ceramic by Doping High-Entropy Oxide

Effect of A- or B-Site Sc Doping on Sintering Temperature, Crystal Structure, Microstructure, and Properties of BaZrxTi1−xO3 Ceramics

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Achieving high energy storage performance below 200 kV/cm in BaTiO3-based medium-entropy ceramics

Cited by 22 publications

References 39 publications

High-Entropy Strategy for Improved Mechanical and Energy Storage Properties in BaTiO3–BiFeO3-Based Ceramics

High-Entropy Strategy for Improved Mechanical and Energy Storage Properties in BaTiO3–BiFeO3-Based Ceramics

Enhancement of Charge-Discharge Properties and Temperature Stability of (Ba0.975Na0.05)Ti0.99Nb0.01O3 Ceramic by Doping High-Entropy Oxide

Effect of A- or B-Site Sc Doping on Sintering Temperature, Crystal Structure, Microstructure, and Properties of BaZrxTi1−xO3 Ceramics

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High-Entropy Strategy for Improved Mechanical and Energy Storage Properties in BaTiO₃–BiFeO₃-Based Ceramics

High-Entropy Strategy for Improved Mechanical and Energy Storage Properties in BaTiO₃–BiFeO₃-Based Ceramics

Enhancement of Charge-Discharge Properties and Temperature Stability of (Ba_0.975Na_0.05)Ti_0.99Nb_0.01O₃ Ceramic by Doping High-Entropy Oxide