Superior Capacitive Energy Storage of BaTiO₃-Based Polymorphic Relaxor Ferroelectrics Engineered by Mesoscopically Chemical Homogeneity.

ABSTRACT: Relaxor ferroelectrics exhibit giant potentials in capacitive energy storage, however, the scales of polar nanoregions determine the critical field values where the polarization saturation occurs. In this work, a mesoscopic structure engineered ergodic relaxor state is realized by adjusting submicron-grain scaled chemical homogenity, exhibiting polymorphic polar nanoregions of various scales in different grains. This produces a relatively continuous polarization switching with increasing the applied electric field from diverse grains, thus resulting in a linear-like polarization response feature. As a result, both a giant energy density (W_rec) ≈15.4 J cm^-3 and a field-insensitive ultrahigh efficiency (η) ≈93.2% are simultaneously achieved at 78 kV mm^-1 in (

SUBMITTER: Xie A 

PROVIDER: S-EPMC12279175 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature