Excellent energy storage performance of La2O3-modified high-entropy ceramics under moderate electric fields

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2025-08-30 DOI:10.1016/j.jeurceramsoc.2025.117785

Hao Li , Liwen Zhang , Xiaoxu Feng , Hengtong Zhao , Tiantian Zhang , Pei Han , Ningning Sun , Ye Zhao , Chunxiao Lu , Jinhua Du , Xiaowei Li , Yong Li , Xihong Hao

{"title":"Excellent energy storage performance of La2O3-modified high-entropy ceramics under moderate electric fields","authors":"Hao Li , Liwen Zhang , Xiaoxu Feng , Hengtong Zhao , Tiantian Zhang , Pei Han , Ningning Sun , Ye Zhao , Chunxiao Lu , Jinhua Du , Xiaowei Li , Yong Li , Xihong Hao","doi":"10.1016/j.jeurceramsoc.2025.117785","DOIUrl":null,"url":null,"abstract":"<div><div>Ceramic capacitors are widely recognized as critical components in power electronic systems. However, it remains challenging to attain high energy density in small electronic devices operating within a moderate electric field environment. In this study, La2O3-modified (Bi0.2Na0.2Ba0.2Sr0.2Ca0.2)TiO3 (BNBSCT) high-entropy ceramics were successfully synthesized via tape-casting method. The introduction of La2O3 enhances relaxation characteristics and decrease the size of nanodomains, thereby effectively reducing remnant polarization (Pr). Additionally, La2O3 not only refine the grain microstructure and reduce oxygen vacancy concentration but also effectively suppress interfacial polarization, significantly enhances the ceramic’s breakdown strength (Eb). As a result, (Bi0.2Na0.2Ba0.2Sr0.2Ca0.2)TiO35 wt% La2O3 (BNBSCT-5L) ceramic achieved high recoverable energy density (Wrec) of 5.10 J/cm3 with efficiency (η) of 83.31 % under a moderate electric field of 330 kV/cm. Moreover, BNBSCT-5L ceramic demonstrates outstanding temperature, frequency and cycle stability. These superior properties indicate that the BNBSCT-5L ceramic exhibits exceptional potential for energy storage applications.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 2","pages":"Article 117785"},"PeriodicalIF":6.2000,"publicationDate":"2025-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of The European Ceramic Society","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0955221925006065","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}

引用次数: 0

Abstract

Ceramic capacitors are widely recognized as critical components in power electronic systems. However, it remains challenging to attain high energy density in small electronic devices operating within a moderate electric field environment. In this study, La₂O₃-modified (Bi_0.2Na_0.2Ba_0.2Sr_0.2Ca_0.2)TiO₃ (BNBSCT) high-entropy ceramics were successfully synthesized via tape-casting method. The introduction of La₂O₃ enhances relaxation characteristics and decrease the size of nanodomains, thereby effectively reducing remnant polarization (P_r). Additionally, La₂O₃ not only refine the grain microstructure and reduce oxygen vacancy concentration but also effectively suppress interfacial polarization, significantly enhances the ceramic’s breakdown strength (E_b). As a result, (Bi_0.2Na_0.2Ba_0.2Sr_0.2Ca_0.2)TiO₃5 wt% La₂O₃ (BNBSCT-5L) ceramic achieved high recoverable energy density (W_rec) of 5.10 J/cm³ with efficiency (η) of 83.31 % under a moderate electric field of 330 kV/cm. Moreover, BNBSCT-5L ceramic demonstrates outstanding temperature, frequency and cycle stability. These superior properties indicate that the BNBSCT-5L ceramic exhibits exceptional potential for energy storage applications.

查看原文本刊更多论文

la2o3改性高熵陶瓷在中等电场条件下具有优异的储能性能

陶瓷电容器是电力电子系统中公认的重要器件。然而，在中等电场环境下运行的小型电子设备中实现高能量密度仍然具有挑战性。本研究通过带铸法制备了la2o3改性（Bi0.2Na0.2Ba0.2Sr0.2Ca0.2）TiO3 （BNBSCT）高熵陶瓷。La2O3的引入增强了弛豫特性，减小了纳米畴的尺寸，从而有效地减少了残余极化（Pr）。此外，La2O3不仅细化了晶粒微观结构，降低了氧空位浓度，而且有效抑制了界面极化，显著提高了陶瓷的击穿强度（Eb）。结果表明，在330 kV/cm的中等电场作用下，（Bi0.2Na0.2Ba0.2Sr0.2Ca0.2）TiO35 wt% La2O3 （BNBSCT-5L）陶瓷的可回收能量密度（Wrec）为5.10 J/cm3，效率（η）为83.31 %。此外，BNBSCT-5L陶瓷具有出色的温度、频率和循环稳定性。这些优异的性能表明BNBSCT-5L陶瓷在储能应用方面具有非凡的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Journal of The European Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

10.70

自引率

12.30%

发文量

863

审稿时长

35 days

期刊介绍： The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.