无铅电容器中延迟极化饱和与增强击穿强度的协同优化，实现卓越的储能特性

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2024-09-20 DOI:10.1016/j.ceramint.2024.09.156

Hailin Zhang, Peng Nong, Haochen Duan, Youya Ke, Xiuli Chen, Xu Li, Huanfu Zhou

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引用次数: 0

摘要

高性能电介质储能陶瓷是脉冲功率系统中不可或缺的核心部件。尽管在提高储能性能方面取得了进展，但各种宏观性能参数之间仍存在显著限制，阻碍了其微型化和集成到设备中。在此，我们提出了一种新型弱耦合弛豫铁电陶瓷系统，它能延迟基于 BaTiO3 陶瓷的过早极化饱和，从而实现理想的储能特性。在 540 kV cm-1 的电场下，该陶瓷的能量存储密度（Wrec）高达 ∼4.58 J cm-3，能量效率（η）高达 ∼95.2%，并且在 40-160 °C 和 1-120 Hz 范围内具有良好的性能稳定性。此外，绝缘性能的增强和平均晶粒尺寸的细化也有助于提高系统的击穿场强（Eb）。这些发现为设计具有高储能特性的介电陶瓷电容器提供了可行的框架。

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Synergistic optimization of delayed polarization saturation and enhanced breakdown strength in lead-free capacitors for superior energy storage characteristics

High-performance dielectric energy-storage ceramics are indispensable core components in pulsed power systems. Despite progress in enhancing energy storage performance, there are still significant constraints among various macroscopic performance parameters, hindering their miniaturization and integration into devices. Herein, we propose a novel weakly coupled relaxor ferroelectric ceramic system that delays premature polarization saturation of BaTiO₃-based ceramics to achieve the desirable energy storage characteristics. The ceramic exhibits a high energy storage density (W_rec) of ∼4.58 J cm⁻³ and high energy efficiency (η) of ∼95.2 % under an electric field of 540 kV cm⁻¹, along with good performance stability in the range of 40–160 °C and 1–120 Hz. Furthermore, the enhanced insulation properties and refined average grain size contribute to the high breakdown field strength (E_b) of the system. These findings provide a viable framework for the design of dielectric ceramic capacitors with high energy-storage characteristics.

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.