Ultrahigh energy storage in high-entropy ceramic capacitors with polymorphic relaxor phase.
- Resource Type
- Article
- Authors
- Min Zhang; Shun Lan; Yang, Bing B.; Hao Pan; Liu, Yi Q.; Zhang, Qing H.; Qi, Jun L.; Di Chen; Hang Su; Di Yi; Yang, Yue Y.; Rui Wei; Cai, Hong D.; Han, Hao J.; Lin Gu; Ce-Wen Nan; Yuan-Hua Lin,
- Source
- Science; 4/12/2024, Vol. 384 Issue 6692, p185-189, 5p, 4 Diagrams
- Subject
- Energy storage
Barium titanate
Relaxor ferroelectrics
Energy density
Ceramic capacitors
Electronic equipment
Entropy
Electronic systems
- Language
- ISSN
- 00368075
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 (BaTiO3)–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. [ABSTRACT FROM AUTHOR]