Polymorphic relaxor phase and defect dipole polarization co-reinforced capacitor energy storage in temperature-monitorable high-entropy ferroelectrics

Nature Communications, Год журнала: 2025, Номер 16(1)

Опубликована: Фев. 22, 2025

Язык: Английский

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High-entropy assisted capacitive energy storage in relaxor ferroelectrics by chemical short-range order

Nature Communications, Год журнала: 2025, Номер 16(1)

Опубликована: Янв. 18, 2025

Next-generation advanced high/pulsed power capacitors rely heavily on dielectric ceramics with high energy storage performance. Although entropy relaxor ferroelectric exhibited enormous potential in functional materials, the chemical short-range order, which is a common phenomenon alloys to modulate performances, have been paid less attention here. We design order strategy polarization response under external electric field and achieve substantial enhancements of properties, i.e. an ultrahigh density ~16.4 J/cm3 markedly improved efficiency ~90% at 85 kV/mm Nb doped (Bi0.2Na0.2K0.2La0.2Sr0.2) TiO3 system. Atomic-scale scanning transmission electron microscopy observations show that exhibits structure, enriched regions displaying ultrasmall polar nanoregions more flexible configurations, conducive achieving maximum low residual polarization. Moreover, refined grain size ~0.25μm, suppressed oxygen vacancies enhanced bandwidth contribute breakdown strength. These collective factors result exceptionally efficiency. This expected enhance performances other ferroelectrics. The authors propose for designing ordering high-entropy ceramics, where elements exhibit lower local barriers.

Язык: Английский

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Optimization of piezoelectric properties of 0.7BiFeCo0.004O3-0.3BaTiO3 ceramics by adjusting dwell time during the sintering process

Ceramics International, Год журнала: 2025, Номер unknown

Опубликована: Фев. 1, 2025

Язык: Английский

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Achieving Exceptional Energy Storage Performance in PbHfO3 Antiferroelectric Ceramics through Defect Engineering Design

Materials Horizons, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Defect engineering improves breakdown strength, reduces conduction losses and induces localized disorder to achieve an ultra-high energy storage density.

Язык: Английский

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High-Entropy Composition Design for Achieving Excellent Energy Storage Performance in (Bi_0.5Na_0.5)_0.94Ba_0.06TiO₃-Based Ceramics

ACS Applied Electronic Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 7, 2025

Язык: Английский

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Enhanced energy storage performance in 0.94Na0.5Bi0.5TiO3-0.06BaTiO3 ceramics under moderate electric field via design of heterogeneous polyionic dopants

Ceramics International, Год журнала: 2025, Номер unknown

Опубликована: Март 1, 2025

Язык: Английский

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Improving Energy Storage Performance of (Bi0.5Na0.5)0.94Ba0.06TiO3-based High-entropy Ceramics by A/B-site Co-regulation

Ceramics International, Год журнала: 2025, Номер unknown

Опубликована: Март 1, 2025

Язык: Английский

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Unlocking the key role of electric field stimulus in ferroelectric photochromic phosphor for partitioned optical storage and encrypted transmission

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 161568 - 161568

Опубликована: Март 1, 2025

Язык: Английский

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Achieving Excellent Energy Storage Properties in Lead-Free Ceramics via Competing FE/AFE Phase Coexistence

Energy storage materials, Год журнала: 2025, Номер unknown, С. 104205 - 104205

Опубликована: Март 1, 2025

Язык: Английский

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Near‐Zero Energy Dissipation Multilayer Ceramic Capacitors via Inhomogeneous Polarization Design

Small, Год журнала: 2025, Номер unknown

Опубликована: Март 27, 2025

Multilayer ceramic capacitors (MLCCs) demonstrate considerable potential for advance pulsed power systems, owing to their high-power density and fast charge/discharge capabilities. In light of the increasing demand energy conservation, minimizing dissipation in storage while maintaining high recoverable densities is essential practical application. this study, building upon morphotropic phase boundary (MPB) between Bi0.5Na0.5TiO3 (BNT) NaNbO3, heterogeneous cations (Ba2+, Zn2+, Nb5+) are further doped using an inhomogeneous polarization design enhance random field. This strategy leads formation a disordered polarized structure with nanoscale multiphase characteristics. The results indicate that BNT-based MLCC achieves (Wrec ≈ 9.1 J·cm-3) exceptionally efficiency (η 97.5%) under 620 kV·cm-1. addition, exhibits excellent stability across wide range temperatures frequencies, coupled exceptional performance. study offers approach future development MLCCs near-zero dissipation.

Язык: Английский

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