Superior Electrostatic Storage Energy Under Moderate Electric Field of Superparaelectrics with Highly Polarizable Clusters

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 16, 2025

Abstract Despite the widespread research of relaxor ferroelectrics in pulsed power capacitors, achieving both high recoverable energy density ( W rec ) and efficiency η under moderate electric field range is still challenged because domain miniaturization required to enhance generally leads delayed polarization saturation reduced spontaneous polarization. Here, highly polarizable clusters superparaelectrics with locally coexisted multiphase are demonstrated by introducing Bi 0.5 Li ZrO 3 into BaTiO matrix. The synergistic introduction additional A‐site contribution, domains polar clusters, local coexistence enable maximal P max at extremely low hysteresis. As a result, combined effects heterogeneous cations driven ferroelectricity, valence state difference, A‐ B‐sites ionic radius difference lead giant ≈9.11 J cm −3 ≈95.3% concurrently 47 kV mm −1 . This work demonstrates that modulating characteristic ferroelectric ceramics can achieve superior energy‐storage performances.

Language: Английский

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

Small, Journal Year: 2025, Volume and Issue: unknown

Published: March 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.

Language: Английский