Enhanced energy-storage in lead-free multilayer capacitors via entropy-assisted polymorphic domain engineering.

ABSTRACT: Lead-free multilayer ceramic capacitors with high energy storage performance are essential components in environmentally sustainable and miniaturized pulsed power systems. However, their practical application is limited by inherently low energy density and suboptimal energy efficiency. In this study, a stepwise dual-site entropy increase strategy is introduced to simultaneously modulate relaxor behavior and enhance the breakdown strength of Bi_0.5Na_0.5TiO₃-based capacitors. Atomic-scale structural analyses reveal that the coexistence of rhombohedral, tetragonal, and cubic polymorphic domains effectively prevents premature polarization saturation while maintaining high maximum polarization. Additionally, the high configurational entropy induces non-periodic l

SUBMITTER: Li J 

PROVIDER: S-EPMC12480757 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature