Design strategy of high-entropy perovskite energy-storage ceramics: A review

Journal of the European Ceramic Society, Journal Year: 2024, Volume and Issue: 44(8), P. 4831 - 4843

Published: Feb. 20, 2024

Language: Английский

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Constructing novel SrTiO3-based composite ceramics with high energy storage performance under moderate electric field

Journal of Power Sources, Journal Year: 2024, Volume and Issue: 604, P. 234475 - 234475

Published: April 8, 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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Suppressing interfacial polarization via entropy increase strategy for superior energy-storage performance of Na0.5Bi0.5TiO3-based ceramics

Journal of Materiomics, Journal Year: 2024, Volume and Issue: 10(4), P. 947 - 955

Published: March 21, 2024

High entropy engineering has emerged as a new strategy to improve the energy storage density and efficiency of dielectric capacitors due its unique design concept. However, recyclable (Wrec) reported so far never exceeded 2 J/cm3 for type high-entropy ceramics with equimolar elements occupying A or B site. In order this ceramics. Na0.5Bi0.5TiO3 (NBT) was used matrix, Sr2+, La3+, K+ Ba2+ were gradually introduced into at A-site matrix lattice increase configurational entropy. The results show that relaxor degree, band gap width, interfacial polarization, breakdown field strength are effectively improved increasing Among them, suppressing polarization is an important factor thus enhance performance. (Na1/6Bi1/6Sr1/6La1/6K1/6Ba1/6)TiO3 (NBSLKBT) sample highest shows ultra-high Wrec 9.8 (η = 86.5%). This work demonstrates superior energy-storage performance still works on above opens up way modulating interface by strategy.

Language: Английский

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Relaxor ferroelectric ceramics with excellent energy storage density obtained from BT-based ceramics

Journal of Power Sources, Journal Year: 2023, Volume and Issue: 580, P. 233454 - 233454

Published: July 26, 2023

Language: Английский

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High-performance energy storage in BaTiO3-based oxide ceramics achieved by high-entropy engineering

Journal of Alloys and Compounds, Journal Year: 2023, Volume and Issue: 970, P. 172671 - 172671

Published: Oct. 28, 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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High‐Entropy Design Toward Ultrahigh Energy Storage Density Under Moderate Electric Field in Bulk Lead‐Free Ceramics

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 5, 2024

Abstract Electrostatic capacitors with ultrahigh energy‐storage density are crucial for the miniaturization of pulsed power devices. A long‐standing challenge is developing dielectric materials that achieve recoverable energy W rec ≥ 10 J cm −3 under moderate electric fields (30 ≤ E 50 kV mm −1 ). Herein, a specific high‐entropy strategy proposed to modulate phase structure and interfacial polarization medium‐entropy base using linear dielectrics. This ensures sufficient polar high enough field complete polarization, thereby achieving by enhancing strength. The validity this demonstrated in (Na 0.282 Bi Ba 0.036 Sr 0.28 Nd 0.08 )TiO 3‐x Ca 0.7 0.2 TiO 3 (NBBSNT‐ x CBT) (x = 0–0.15) system. CBT‐modulated samples exhibit polyphase R3c, P4bm, Pm‐3m reduced remnant (Pr). Additionally, addition CBT effectively suppresses maximum ( P max These factors significantly improve value ∆P − r . As result, an 10.5 high‐efficiency η 80.3% obtained 0.1 sample 45 first time. work paves way superior performance fields.

Language: Английский

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Achieving high energy-storage performance of medium-entropy (Na0.25Bi0.25Ca0.25Sr0.25)TiO3 lead-free relaxor ferroelectric ceramic for pulsed power capacitor

Journal of Alloys and Compounds, Journal Year: 2023, Volume and Issue: 970, P. 172524 - 172524

Published: Oct. 14, 2023

Language: Английский

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Widening the temperature range and improving the linearity of CaCu3Ti4O12 ceramics for high-temperature NTC thermistor application through entropy engineering strategy

Journal of Alloys and Compounds, Journal Year: 2023, Volume and Issue: 973, P. 172908 - 172908

Published: Nov. 19, 2023

Language: Английский

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