High-entropy assisted capacitive energy storage in relaxor ferroelectrics by chemical short-range order.

ABSTRACT: Next-generation advanced high/pulsed power capacitors rely heavily on dielectric ceramics with high energy storage performance. Although high entropy relaxor ferroelectric exhibited enormous potential in functional materials, the chemical short-range order, which is a common phenomenon in high entropy alloys to modulate performances, have been paid less attention here. We design a chemical short-range order strategy to modulate polarization response under external electric field and achieve substantial enhancements of energy storage properties, i.e. an ultrahigh energy density of ~16.4 J/cm³ with markedly improved efficiency ~90% at an electric field of 85 kV/mm in Nb doped (Bi_0.2Na_0.2K_0.2La_0.2Sr_0.2) TiO₃ system.

SUBMITTER: Wei T 

PROVIDER: S-EPMC11742713 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature