Embedding Plate‐Like Pyrochlore in Perovskite Phase to Enhance Energy Storage Performance of BNT‐Based Ceramic Capacitors

IF 24.4 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Advanced Energy Materials Pub Date : 2024-11-09 DOI:10.1002/aenm.202403926

Simin Wang, Jin Qian, Guanglong Ge, Faqiang Zhang, Fei Yan, Jinfeng Lin, Luomeng Tang, Menghao Yang, Zhongbin Pan, Xiao Wei, Bo Shen, Zhifu Liu, Jiwei Zhai

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Abstract

Next‐generation electrical and electronic systems rely on the development of efficient energy‐storage dielectric ceramic capacitors. However, achieving a synergistic enhancement in the polarization and in the breakdown field strength (Eb) presents a considerable challenge. Herein, a heterogeneous combination strategy involving embedding a high Eb plate‐like pyrochlore phase in a high‐polarization perovskite phase is proposed. The embedded plate‐like pyrochlore increases the breakdown field strength and promotes the dynamic polarization response. Meanwhile, the strong spin–orbit coupling effect of the 5d electrons is conducive to the maintenance of the high polarization value of the perovskite. Consequently, the prepared multilayer ceramic capacitor (MLCC) exhibits an ultrahigh Eb and a high polarization. More specifically, an energy storage density (Wrec) of 14.9 J cm−3 with an efficiency of up to 93.4% is achieved for the optimized pyrochlore/perovskite phase. Furthermore, the MLCCs also exhibits an Wrec of ≈ 7.7 J cm−3 ± 4.5% in the temperature range of −50–180 °C. Therefore, this heterogeneous combination strategy therefore provides a simple and effective method for improving the energy‐storage performances of dielectric ceramic capacitors.

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在过氧化物相中嵌入板状火烧体，提高基于 BNT 的陶瓷电容器的储能性能

下一代电气和电子系统依赖于高效储能电介质陶瓷电容器的开发。然而，实现极化和击穿场强（Eb）的协同增强是一个相当大的挑战。在此，我们提出了一种异质组合策略，即在高极化包晶石相中嵌入高 Eb 板状火成岩相。嵌入的板状火成相增加了击穿场强，促进了动态极化响应。同时，5d 电子的强自旋轨道耦合效应有利于维持包晶的高极化值。因此，制备的多层陶瓷电容器（MLCC）具有超高的 Eb 值和极化值。更具体地说，经过优化的热绿核/过氧化物相的储能密度（Wrec）达到了 14.9 J cm-3，效率高达 93.4%。此外，在 -50-180 °C 的温度范围内，MLCC 的 Wrec 值也达到了 ≈ 7.7 J cm-3 ± 4.5%。因此，这种异质组合策略为提高电介质陶瓷电容器的储能性能提供了一种简单而有效的方法。

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

Advanced Energy Materials CHEMISTRY, PHYSICAL-ENERGY & FUELS

CiteScore

41.90

自引率

4.00%

发文量

889

审稿时长

1.4 months

期刊介绍： Established in 2011, Advanced Energy Materials is an international, interdisciplinary, English-language journal that focuses on materials used in energy harvesting, conversion, and storage. It is regarded as a top-quality journal alongside Advanced Materials, Advanced Functional Materials, and Small. With a 2022 Impact Factor of 27.8, Advanced Energy Materials is considered a prime source for the best energy-related research. The journal covers a wide range of topics in energy-related research, including organic and inorganic photovoltaics, batteries and supercapacitors, fuel cells, hydrogen generation and storage, thermoelectrics, water splitting and photocatalysis, solar fuels and thermosolar power, magnetocalorics, and piezoelectronics. The readership of Advanced Energy Materials includes materials scientists, chemists, physicists, and engineers in both academia and industry. The journal is indexed in various databases and collections, such as Advanced Technologies & Aerospace Database, FIZ Karlsruhe, INSPEC (IET), Science Citation Index Expanded, Technology Collection, and Web of Science, among others.