High-entropy engineered BaTiO3-based ceramic capacitors with greatly enhanced high-temperature energy storage performance

IF 14.7 1区 综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES
Xi Kong, Letao Yang, Fanqi Meng, Tao Zhang, Hejin Zhang, Yuan-Hua Lin, Houbing Huang, Shujun Zhang, Jinming Guo, Ce-Wen Nan
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Abstract

Ceramic capacitors with ultrahigh power density are crucial in modern electrical applications, especially under high-temperature conditions. However, the relatively low energy density limits their application scope and hinders device miniaturization and integration. In this work, we present a high-entropy BaTiO3-based relaxor ceramic with outstanding energy storage properties, achieving a substantial recoverable energy density of 10.9 J/cm3 and a superior energy efficiency of 93% at applied electric field of 720 kV/cm. Of particular importance is that the studied high-entropy composition exhibits excellent energy storage performance across a wide temperature range of −50 to 260 °C, with variation below 9%, additionally, it demonstrates great cycling reliability at 450 kV/cm and 200 °C up to 106 cycles. Electrical and in-situ structural characterizations revealed that the high-entropy engineered local structures are highly stable under varying temperature and electric fields, leading to superior energy storage performance. This study provides a good paradigm of the efficacy of the high-entropy engineering for developing high-performance dielectric capacitors.

Abstract Image

高熵工程batio3基陶瓷电容器,极大地增强了高温储能性能
具有超高功率密度的陶瓷电容器在现代电气应用中至关重要,特别是在高温条件下。然而,相对较低的能量密度限制了它们的应用范围,阻碍了器件的小型化和集成化。在这项工作中,我们提出了一种高熵的基于batio3的弛缓陶瓷,具有出色的储能性能,在720 kV/cm的电场下,实现了10.9 J/cm3的可回收能量密度和93%的优异能量效率。特别重要的是,研究的高熵成分在−50至260°C的宽温度范围内表现出优异的储能性能,变化小于9%,此外,它在450 kV/cm和200°C高达106次循环下表现出良好的循环可靠性。电学和原位结构表征表明,高熵工程的局部结构在不同的温度和电场下具有很高的稳定性,从而具有优异的储能性能。该研究为高熵工程在高性能介质电容器开发中的有效性提供了一个很好的范例。
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来源期刊
Nature Communications
Nature Communications Biological Science Disciplines-
CiteScore
24.90
自引率
2.40%
发文量
6928
审稿时长
3.7 months
期刊介绍: Nature Communications, an open-access journal, publishes high-quality research spanning all areas of the natural sciences. Papers featured in the journal showcase significant advances relevant to specialists in each respective field. With a 2-year impact factor of 16.6 (2022) and a median time of 8 days from submission to the first editorial decision, Nature Communications is committed to rapid dissemination of research findings. As a multidisciplinary journal, it welcomes contributions from biological, health, physical, chemical, Earth, social, mathematical, applied, and engineering sciences, aiming to highlight important breakthroughs within each domain.
文献相关原料
公司名称
产品信息
阿拉丁
MgO
阿拉丁
ZrO2
阿拉丁
TiO2
阿拉丁
Bi2O3
阿拉丁
CaCO3
阿拉丁
BaCO3
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