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

IF 45.8 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Science Pub Date : 2024-04-11 DOI:10.1126/science.adl2931

Min Zhang, Shun Lan, Bing B. Yang, Hao Pan, Yi Q. Liu, Qing H. Zhang, Jun L. Qi, Di Chen, Hang Su, Di Yi, Yue Y. Yang, Rui Wei, Hong D. Cai, Hao J. Han, Lin Gu, Ce-Wen Nan, Yuan-Hua Lin

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引用次数: 0

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 (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.

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具有多晶弛豫相的高熵陶瓷电容器中的超高能量存储

超高功率密度多层陶瓷电容器（MLCC）是电气和电子系统中的关键元件。然而，实现高能量密度和高效率是实际应用的一大挑战。我们在钛酸钡（BaTiO3）基无铅多晶弛豫相 MLCC 中提出了一种高熵设计。这种策略通过降低畴切换势垒有效地减少了磁滞损耗，并通过晶格畸变和晶粒细化的高原子无序性增强了击穿强度。受益于这些协同效应，我们在 MLCC 中实现了每立方厘米 20.8 焦耳的高能量密度和 97.5% 的超高效率。这种方法应普遍适用于设计用于储能和其他相关功能的高性能电介质。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Science 综合性期刊-综合性期刊

CiteScore

61.10

自引率

0.90%

发文量

审稿时长

2.1 months

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