Remarkable energy-storage density together with efficiency of above 92% in high-entropy ferroelectric ceramics

Materials Today Physics, Journal Year: 2024, Volume and Issue: 43, P. 101418 - 101418

Published: March 28, 2024

Language: Английский

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

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(10), P. 12521 - 12533

Published: March 1, 2024

Dielectric capacitors are employed extensively due to their exceptional performance, including a rapid charge–discharge speed and superior power density. However, practical implementation is hindered by constraints in energy-storage density (ESD), efficiency (ESE), thermal stability. To achieve domain engineering improved relaxor behavior 0.67BiFeO3-0.33BaTiO3-based Pb-free ceramics, the concerns have been addressed here employing synergistic high-entropy strategy involving design of composition Sr(Mg1/6Zn1/6Ta1/3Nb1/3)O3 with B-site multielement coexistence high configuration entropy. Remarkably, (0.67-x)BiFeO3-0.33BaTiO3-xSr(Mg1/6Zn1/6Ta1/3Nb1/3)O3 ceramics x = 0.08, good ESE (η) 75% recoverable ESD (Wrec) 2.4 J/cm3 at 190 kV/cm were attained together an ultrahigh hardness ∼7.2 GPa. The strategy, which tailored increase entropy, can be attributed mechanical ES properties. It also explains enhanced random field relaxation behavior, structural ferroelectric rhombohedral (R3c) nonpolar pseudocubic (Pm-3m) symmetries, decreased size, evenly distributed polar nanoregions (PNRs). Moreover, stability outstanding frequency obtained. By boosting BiFeO3–BaTiO3 materials dramatically complete energy storage performance. This suggests that designing high-performance dielectrics entropy convenient yet effective technique, leading development advanced capacitors.

Language: Английский

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Enhanced energy storage properties in BNST-based lead-free relaxor ferroelectric ceramics achieved via a high-entropy strategy

Scripta Materialia, Journal Year: 2024, Volume and Issue: 243, P. 115966 - 115966

Published: Jan. 11, 2024

Language: Английский

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Achieving ultrahigh energy storage density in super relaxor BCZT-based lead-free capacitors through multiphase coexistence

Applied Physics Letters, Journal Year: 2023, Volume and Issue: 122(26)

Published: June 26, 2023

Dielectric capacitors own great potential in next-generation energy storage devices for their fast charge-discharge time, while low capacity limits commercialization. Enormous lead-free ferroelectric ceramic capacitor systems have been reported recent decades, and density has increased rapidly. By comparing with some fashioned materials or techniques, which lacks repeatability, as latterly, we proposed a unique but straightforward way to boost the modified conventional system. Through stoichiometric ratio regulation, coexistence of C-phase T-phase was obtained 0.85(Ba1-xCax)(ZryTi1-y)O3-0.15BiSmO3-2 wt. % MnO ceramics x = 0.1 y 0.15 under proof combination Rietveld XRD refinement transmission electron microscope measurement. The Wrec 3.90 J/cm3, an excellent value BCZT-based at present stage, because co-contribution optimization electric field distribution additional interfacial polarization triggered higher fields. finite element simulation physical deduction, fits very well our experimental result, were also performed. As practical application, stable performance long-time cycle frequency stability obtained, discharge behaviors achieved.

Language: Английский

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Prominent energy storage density and efficiency of Na_0.5Bi_0.5TiO₃‐based ceramics via multiscale amelioration strategy

Journal of the American Ceramic Society, Journal Year: 2023, Volume and Issue: 107(4), P. 2360 - 2370

Published: Nov. 16, 2023

Abstract Eco‐friendly ceramic capacitors gradually become an important section of pulsed power devices. However, the synchronous realization ultra‐high energy storage density ( W rec > 6 J/cm 3 ) and efficiency η 90%) is difficult. Thus, a novel multiscale amelioration strategy in Na 0.5 Bi TiO ‐based ceramics proposed to achieve efficiency. The for (Na 0.47 La 0.03 0.94 Ba 0.06 (NBLBT) focuses on grain size, bandgap width, dielectric relaxor behavior, which can be regulated by introducing Sr(Al Nb 0.25 Ta )O (SANT). On one hand, refined size increased width are conducive improving breakdown strength. other optimized relaxation behavior beneficial suppress remanent polarization. Accordingly, ultrahigh = 6.89 90.1% simultaneously achieved 0.84NBLBT‐ 0.16SANT ceramic. In addition, sample synchronously possesses excellent thermal frequency stability (a variation within 5% ), transient discharge rate t 0.9 ∼ 78.8 ns high‐power P D 114.5 MW/cm . This study provides effective further develop

Language: Английский

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Combustion synthesis of high-performance high-entropy dielectric ceramics for energy storage applications

Ceramics International, Journal Year: 2023, Volume and Issue: 49(15), P. 25486 - 25494

Published: May 11, 2023

Language: Английский

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

Ceramics International, Journal Year: 2023, Volume and Issue: 49(12), P. 20326 - 20333

Published: March 16, 2023

Language: Английский

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Lead-free medium-entropy (Na0.47(1-)Bi0.47(1-)Ba0.06(1-)Sr0.7Nd0.2)TiO3 relaxor ceramics with robust energy-storage performance

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 471, P. 144702 - 144702

Published: July 11, 2023

Language: Английский

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Energy-storage performance of NaNbO3-based ceramic capacitor derived from a high DOP glass network structure

Ceramics International, Journal Year: 2024, Volume and Issue: 50(11), P. 19355 - 19364

Published: March 8, 2024

Language: Английский

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High-entropy perovskite oxides for energy materials: A review

Journal of Energy Storage, Journal Year: 2024, Volume and Issue: 90, P. 111890 - 111890

Published: May 2, 2024

Language: Английский

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