Ultrahigh Energy Storage Density in Glassy Ferroelectric Thin Films under Low Electric Field.

ABSTRACT: The current approach to achieving superior energy storage density in dielectrics is to increase their breakdown strength, which often incurs heat generation and unexpected insulation failures, greatly deteriorating the stability and lifetime of devices. Here, a strategy is proposed for enhancing recoverable energy storage density (W_r ) while maintaining a high energy storage efficiency (η) in glassy ferroelectrics by creating super tetragonal (super-T) nanostructures around morphotropic phase boundary (MPB) rather than exploiting the intensely strong electric fields. Accordingly, a giant W_r of ≈86 J cm^-3 concomitant with a high η of ≈81% is acquired under a moderate electric field (1.7 MV cm^-1 ) in thin films having MPB composition, namely, 0.94(

SUBMITTER: Sun Y 

PROVIDER: S-EPMC9631080 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature