Optimization of energy storage properties in (1 − x)Na0.5Bi0.5TiO3-xSr0.7La0.2TiO3-relaxed ferroelectric ceramics

IF 2.1 3区物理与天体物理 Q3 PHYSICS, APPLIED

Journal of Advanced Dielectrics Pub Date : 2022-10-27 DOI:10.1142/s2010135x22420036

Zi-yue Ma, Jian-qi Zhu, Jianhua Wu, Yanhua Hu, X. Lou, Ningning Sun, Ye Zhao, Yong Li, Xihong Hao

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引用次数: 1

Abstract

Ferroelectric materials are considered to be the most competitive energy storage materials for applications in pulsed power electronics due to excellent charge–discharge properties. However, the low energy storage density is the primary problem limiting their practical application. In this study, (1[Formula: see text])Na[Formula: see text]Bi[Formula: see text]TiO3–[Formula: see text]Sr[Formula: see text]La[Formula: see text]TiO3[(1[Formula: see text])NBT–[Formula: see text]SLT] ferroelectric ceramics are found to exhibit excellent energy storage performances through a synergistic strategy. As the SLT concentration increases, the relaxation characteristic increases significantly and the breakdown strength increases dramatically from 150 kV/cm to 220 kV/cm. The recoverable energy storage density of the 0.55NBT–0.45SLT ceramic is 2.86 J/cm3 with an energy storage efficiency of 88% under an electric field of 220 kV/cm. Furthermore, the ceramic with [Formula: see text] = 0.45 mol exhibited excellent energy storage stability in the ranges of 20–180[Formula: see text]C (temperature) and 1–125 Hz (frequency). These excellent properties demonstrate the potential of (1[Formula: see text])NBT–[Formula: see text] SLT ceramics when used as dielectric capacitors in pulsed power systems.

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(1−x) na0.5 bi0.5 tio3 - xsr0.7 la0.2 tio3弛豫铁电陶瓷储能性能优化

铁电材料因其优异的充放电性能而被认为是脉冲电力电子中最具竞争力的储能材料。然而，储能密度低是制约其实际应用的主要问题。在本研究中，发现(1[公式:见文])Na[公式:见文]Bi[公式:见文]TiO3 -[公式:见文]Sr[公式:见文]La[公式:见文]TiO3[(1[公式:见文])NBT -[公式:见文]SLT]铁电陶瓷通过协同策略表现出优异的储能性能。随着SLT浓度的增加，弛缓特性显著增强，击穿强度从150 kV/cm急剧增加到220 kV/cm。在220 kV/cm电场下，0.55NBT-0.45SLT陶瓷的可回收储能密度为2.86 J/cm3，储能效率为88%。此外，当[公式:见文]= 0.45 mol时，陶瓷在20-180[公式:见文]C(温度)和1-125 Hz(频率)范围内表现出优异的储能稳定性。这些优异的性能表明(1[公式:见文本])NBT -[公式:见文本]SLT陶瓷在脉冲电源系统中用作介电电容器的潜力。

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

Journal of Advanced Dielectrics PHYSICS, APPLIED-

CiteScore

3.80

自引率

6.50%

发文量

审稿时长

18 weeks

期刊介绍： The Journal of Advanced Dielectrics is an international peer-reviewed journal for original contributions on the understanding and applications of dielectrics in modern electronic devices and systems. The journal seeks to provide an interdisciplinary forum for the rapid communication of novel research of high quality in, but not limited to, the following topics: Fundamentals of dielectrics (ab initio or first-principles calculations, density functional theory, phenomenological approaches). Polarization and related phenomena (spontaneous polarization, domain structure, polarization reversal). Dielectric relaxation (universal relaxation law, relaxor ferroelectrics, giant permittivity, flexoelectric effect). Ferroelectric materials and devices (single crystals and ceramics). Thin/thick films and devices (ferroelectric memory devices, capacitors). Piezoelectric materials and applications (lead-based piezo-ceramics and crystals, lead-free piezoelectrics). Pyroelectric materials and devices Multiferroics (single phase multiferroics, composite ferromagnetic ferroelectric materials). Electrooptic and photonic materials. Energy harvesting and storage materials (polymer, composite, super-capacitor). Phase transitions and structural characterizations. Microwave and milimeterwave dielectrics. Nanostructure, size effects and characterizations. Engineering dielectrics for high voltage applications (insulation, electrical breakdown). Modeling (microstructure evolution and microstructure-property relationships, multiscale modeling of dielectrics).

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