通过熵工程实现基于 Na0.35Bi0.35Sr0.3TiO3 的弛豫铁电材料的出色储能特性和介电温度可靠性

IF 8.6 2区工程技术 Q1 ENERGY & FUELS

Sustainable Materials and Technologies Pub Date : 2024-11-09 DOI:10.1016/j.susmat.2024.e01172

Zhemin Chen, Yongping Pu, Yiting Hui, Qi Zhang, Yating Ning, Lei Zhang, Chunhui Wu

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引用次数: 0

摘要

如何实现弛豫铁电材料的优异综合性能，以满足电容器的需求，是一项挑战。在这项研究中，一种有效的熵工程策略解决了上述问题。通过固相反应法制备了 (1-x)Na0.35Bi0.35Sr0.3TiO3-xCa0.85Sm0.1(Mg1/3Nb2/3)O3 (NBST-xCSMN) 陶瓷。采用线性介电 CSMN 作为添加剂来调节样品的构型熵（∆Sconfig）。结果表明，提高 ∆Sconfig 有利于减小晶粒尺寸和界面极化，提高活化能并优化介电特性。在 NBST-0.15CSMN 中，∆Sconfig = 1.91R 的能量存储能力（Wrec = 5.2 J/cm3，η = 88 %）以及介电温度可靠性（∆C/C25°C ≤ ± 15 %，-57-323 °C）均优于 X9R。这项研究表明，熵工程是设计具有高性能的下一代电容器的捷径。

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Outstanding energy storage properties and dielectric temperature reliability in Na0.35Bi0.35Sr0.3TiO3-based relaxor ferroelectrics through entropy engineering

It is challenging to realize excellent overall properties of relaxor ferroelectrics to overcome the demands of capacitors. In this research, an effective strategy of entropy engineering addresses the above problem. The (1-x)Na_0.35Bi_0.35Sr_0.3TiO₃-xCa_0.85Sm_0.1(Mg_1/3Nb_2/3)O₃ (NBST-xCSMN) ceramics were prepared via a solid-phase reaction method. The linear dielectric CSMN was adopted as additive to adjust the configuration entropy (∆S_config) of samples. The outcomes indicate that the enhancement of ∆S_config is beneficial to reduce grain size and interfacial polarization, improve activation energy and optimize dielectric features. The superior energy storage capability (W_rec = 5.2 J/cm³, η = 88 %) as well as dielectric temperature reliability (∆C/C_25°C ≤ ± 15 %, −57–323 °C) in accordance with X9R was gained in NBST-0.15CSMN with ∆S_config = 1.91R. This study indicates that entropy engineering is a shortcut to design next-generation capacitors with high comprehensive performance.

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来源期刊

Sustainable Materials and Technologies Energy-Renewable Energy, Sustainability and the Environment

CiteScore

13.40

自引率

4.20%

发文量

158

审稿时长

45 days

期刊介绍： Sustainable Materials and Technologies (SM&T), an international, cross-disciplinary, fully open access journal published by Elsevier, focuses on original full-length research articles and reviews. It covers applied or fundamental science of nano-, micro-, meso-, and macro-scale aspects of materials and technologies for sustainable development. SM&T gives special attention to contributions that bridge the knowledge gap between materials and system designs.