Tailoring Phase Fraction Induced Saturation Polarization Delay for High-Performance BaTiO3-Based Relaxed Ferroelectric Capacitors

Electrostatic capacitors based on dielectric materialsare essentialfor enabling technological advances, including miniaturization andintegration of electronic devices. However, maintaining a high polarizationand breakdown field strength simultaneously in electrostatic capacitorsremains a major challenge for industrial applications. Herein, a universalapproach to delaying saturation polarization in BaTiO3-basedceramic is reported via tailoring phase fraction to improve capacitiveperformance. The ceramic of 0.85(0.7BaTiO(3)-0.3Bi(0.5)Na(0.5)TiO(3))-0.15Bi(0.5)Li(0.5)(Ti0.75Ta0.2)O-3 delivers an ultrahighrecoverable energy density (W (rec)) of 7.16J cm(-3) along with an efficiency (& eta;) of approximately90% at a breakdown electric field of 700 kV cm(-1), outperforming the current BaTiO3-based ceramics andother lead-free ceramics. Meanwhile, the W (rec) and & eta; exhibit wide frequency, temperature, and cycling fatiguestability. Additionally, both an extremely fast discharge time of115 ns and a large power density of 106.16 MW cm(-3) are concurrently attained. This work offers a promising pathwayfor delaying saturation polarization design in order to create scalablehigh-energy-density ceramics capacitors and highlight the researchprospects of pulse power applications.

Automated summary

A universal approach to delaying saturation polarization in BaTiO3-based ceramic is reported, which improves the capacitive performance. The ceramic exhibits an ultrahigh recoverable energy density and high efficiency, as well as wide stability in frequency, temperature, and cycling fatigue. This work offers a promising pathway for high-energy-density ceramic capacitors and pulse power applications.