Abstract Next-generation advanced high/pulsed power capacitors rely heavily on dielectric ceramics with high energy storage performance. However, thus far, the huge challenge of realizing ultrahigh recoverable energy storage density ( W rec ) accompanied by ultrahigh efficiency ( η ) still existed and has become a key bottleneck restricting the development of dielectric materials in cutting-edge energy storage applications. Here, we propose a high-entropy strategy to design “local polymorphic distortion” including rhombohedral-orthorhombic-tetragonal-cubic multiphase nanoclusters and random oxygen octahedral tilt, resulting in ultrasmall polar nanoregions, an enhanced breakdown electric field, and delayed polarization saturation. A giant W rec ~10.06 J cm −3 is realized in lead-free relaxor ferroelectrics, especially with an ultrahigh η ~90.8%, showing breakthrough progress in the comprehensive energy storage performance for lead-free bulk ceramics. This work opens up an effective avenue to design dielectric materials with ultrahigh comprehensive energy storage performance to meet the demanding requirements of advanced energy storage applications. 

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Giant energy-storage density with ultrahigh efficiency in lead-free relaxors via high-entropy design

Ultrahigh energy storage density in lead-free relaxor antiferroelectric ceramics via domain engineering

Ultrahigh energy storage density in (Bi0.5Na0.5)0.65Sr0.35TiO3-based lead-free relaxor ceramics with excellent temperature stability

Local Structure Engineered Lead-Free Ferroic Dielectrics for Superior Energy-Storage Capacitors: A Review

Local structure engineered lead-free ferroic dielectrics for superior energy-storage capacitors: A review

Enhanced energy storage properties of lead-free NaNbO3-based ceramics via A/B-site substitution

Simultaneously achieving ultrahigh energy density and power density in PbZrO3-based antiferroelectric ceramics with field-induced multistage phase transition

Xiangjun Meng

Papers

Ultrahigh energy storage density in lead-free relaxor antiferroelectric ceramics via domain engineering

Enhanced energy storage properties of lead-free NaNbO3-based ceramics via A/B-site substitution

Simultaneously achieving ultrahigh energy density and power density in PbZrO3-based antiferroelectric ceramics with field-induced multistage phase transition

Systematical investigation on energy-storage behavior of PLZST antiferroelectric ceramics by composition optimizing

Synergistically achieving ultrahigh energy-storage density and efficiency in linear-like lead-based multilayer ceramic capacitor