# Ultrahigh energy storage in high-entropy ceramic capacitors with polymorphic relaxor phase

“Ultrahigh energy storage in high-entropy ceramic capacitors with polymorphic relaxor phase” (2024), by Min Zhang et al. Materials Science research paper. Original abstract below, unchanged. No free PDF was found.

- Authors: Min Zhang, Shun Lan, Bing B. Yang, Hao Pan, Yi Q. Liu, Qing H. Zhang, Junlei Qi, Di Chen, Hang Su, Di Yi et al.
- Published: April 11, 2024
- Field: Materials Science
- DOI: https://doi.org/10.1126/science.adl2931
- Source: https://doi.org/10.1126/science.adl2931

## Abstract

Ultrahigh–power-density multilayer ceramic capacitors (MLCCs) are critical components in electrical and electronic systems. However, the realization of a high energy density combined with a high efficiency is a major challenge for practical applications. We propose a high-entropy design in barium titanate (BaTiO 3 )–based lead-free MLCCs with polymorphic relaxor phase. This strategy effectively minimizes hysteresis loss by lowering the domain-switching barriers and enhances the breakdown strength by the high atomic disorder with lattice distortion and grain refining. Benefiting from the synergistic effects, we achieved a high energy density of 20.8 joules per cubic centimeter with an ultrahigh efficiency of 97.5% in the MLCCs. This approach should be universally applicable to designing high-performance dielectrics for energy storage and other related functionalities.

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