Structurally Regulated Design Strategy of BiNaTiO-Based Ceramics for High Energy-Storage Performance at a Low Electric Field.

Dielectric ceramic capacitors are prospective energy-storage devices for pulsed-power systems owing to their ultrafast charge-discharge speed. However, low energy-storage density makes them difficult to commercialize for high-pulse-power technology applications. Herein, we presented a structurally regulated design strategy to disrupt a long-range ferroelectric order, refined grains, and eventually achieve excellent comprehensive energy-storage performance in (1 - ) (0.

Local Isomeric Polar Nanoclusters Enabled Superior Capacitive Energy Storage Under Moderate Fields in NaNbO-Based Lead-Free Ceramics.

The high-field energy-storage performance of dielectric capacitors has been significantly improved in recent years, yet the high voltage risks of device failure and large cost of insulation technology increase the demand for high-performance dielectric capacitors at finite electric fields. Herein, a unique superparaelectric state filled with polar nanoclusters with various local symmetries for lead-free relaxor ferroelectric capacitors is subtly designed through a simple chemical modification method, successfully realizing a collaborative improvement of polarization hysteresis, maximum polarization, and polarization saturation at moderate electric fields of 20-30 kV mm. Therefore, a giant recoverable energy density of ≈5.

Excellent Energy-Storage Performance of (0.85 - )NaNbO-NaSbO-0.15(NaLa)TiO Antiferroelectric Ceramics through B-Site Sb Driven Phase Transition.

NaNbO-based relaxor antiferroelectric (AFE) ceramics are receiving more and more attention for high power pulse applications. A commonly used design strategy is to add complex perovskites with lower tolerance factors. Herein, a new lead-free AFE system of (0.

Superior Energy-Storage Properties in BiNaTiO-Based Lead-Free Ceramics via Simultaneously Manipulating Multiscale Structure and Field-Induced Structure Transition.

Pratical applications have put forward great challenges to the comprehensive energy-storage performance of ceramic material. Here, a novel route of simultaneously manipulating multiscale structure and the field-induced structural transformation in (BiNa)TiO-based ceramics is proposed to address the above concern. The multiscale structure of 0.

Supercritical Relaxor Nanograined Ferroelectrics for Ultrahigh-Energy-Storage Capacitors.

Supercritical relaxor nanograined ferroelectrics are demonstrated for high-performance dielectric capacitors, showing record-high overall properties of energy density ≈13.1 J cm and field-insensitive efficiency ≈90% at ≈74 kV mm and superior charge-discharge performances of high power density ≈700 MW cm , high discharge energy density ≈6.67 J cm , and ultrashort discharge time <40 ns at 55 kV mm .

Ultrahigh Energy-Storage Performances in Lead-free NaBiTiO-Based Relaxor Antiferroelectric Ceramics through a Synergistic Design Strategy.

Dielectric ceramics with outstanding energy-storage performances are nowadays in great demand for pulsed power electronic systems. Here, we propose a synergistic design strategy to significantly enhance the energy-storage properties of (1 - )(0.94NaBiTiO-0.

Achieving Remarkable Amplification of Energy-Storage Density in Two-Step Sintered NaNbO-SrTiO Antiferroelectric Capacitors through Dual Adjustment of Local Heterogeneity and Grain Scale.

Antiferroelectric (AFE) materials exhibit outstanding advantages against linear or ferroelectric (FE) dielectrics in high-performance energy-storage capacitors. However, their energy-storage performances are usually restricted by both extremely large hysteresis and insufficiently high driving field of the AFE-FE phase transition, which has been a longstanding issue to be overcome in the community. In this work, we report a two-step sintered 0.