High‐performance ferroelectric based materials via high‐entropy strategy: Design, properties, and mechanism

Abstract

High‐performance ferroelectric materials are widely used in various electronic devices owing to the function of mutual conversion among different energies, which mainly relates to their special structure gene of polarization configuration. Recent researches show that the high‐entropy strategy has emerged as an effective and flexible approach for boosting physical properties in high‐entropy ferroelectrics via the delicate design of local polarization configurations and other intrinsic effects caused by entropy increment, such as entropy stabilization, lattice disorder, inhibition of grain coarsening, improved mechanical properties, cocktail effect, and so on. In this review, the recent research progress about high‐entropy ferroelectrics has been summarized, especially for the directional design of novel local polarization configurations according to the characteristics of different electrical properties such as high piezoelectricity, high‐efficiency energy storage, and large electrostriction, providing a guidance for designing and exploring more novel local polarization configurations in high‐entropy ferroelectrics for generating higher performance.image

High-entropy superparaelectrics with locally diverse ferroic distortion for high-capacitive energy storage

“…5d). Such transition regions are considered to be M-like symmetries with different vector angles and amplitudes 26,40,41 , indicating the coexistence of diverse local symmetries with C-R-T-M-like in the SLTT-0.30 ceramic. This phenomenon reduces the polarization anisotropy [42][43][44] , leading to the reduction of the polarization switching energy barriers and thus ultimately achieving macroscopic SPE behavior.…”

A polarization double-enhancement strategy to achieve super low energy consumption with ultra-high energy storage capacity in BCZT-based relaxor ferroelectrics

“…Dielectric energy storage capacitors, which are considered the most promising candidates for next-generation high-power systems, have attracted considerable research attention in recent decades due to their superfast charge–discharge speed and good reliability after long-term use. 1–12 According to the Ragone plots displayed in Fig. S1 (ESI†), however, no single energy storage device can simultaneously possess high energy storage density ( W rec ) and power density ( P d ), commonly regarded as two key figures-of-merit of power systems.…”