High-Entropy Engineered (Bi0.2Na0.2Ba0.2K0.2La0.2)TiO3-xCa(Hf0.7Zr0.3)O3 Lead-Free Ceramics for Superior Energy Storage Performance.

IF 8.2 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Applied Materials & Interfaces Pub Date : 2025-10-18 DOI:10.1021/acsami.5c10550

Xiangluo Miao,Run Jing,Shibang Zhang,Pengfei Li,Jiayu Luo,Aihua Zhang,Changan Wang,Chung Ming Leung,Min Zeng

{"title":"High-Entropy Engineered (Bi0.2Na0.2Ba0.2K0.2La0.2)TiO3-xCa(Hf0.7Zr0.3)O3 Lead-Free Ceramics for Superior Energy Storage Performance.","authors":"Xiangluo Miao,Run Jing,Shibang Zhang,Pengfei Li,Jiayu Luo,Aihua Zhang,Changan Wang,Chung Ming Leung,Min Zeng","doi":"10.1021/acsami.5c10550","DOIUrl":null,"url":null,"abstract":"Environmentally friendly dielectric ceramics with high energy storage are indispensable for advanced pulsed power capacitors, primarily due to their outstanding power density. Nevertheless, the relatively low energy storage performance (ESP) of these ceramics continues to limit their broader applications. Here, a series of lead-free (Bi0.2Na0.2Ba0.2K0.2La0.2)TiO3-xCa(Hf0.7Zr0.3)O3 high-entropy ceramics (abbreviated as BNBKLT-xCHZ HECs) was prepared based on a synergistic high-entropy design, aiming to achieve enhanced ESP. Remarkably, BNBKLT-0.15CHZ ceramics characterized by high configurational entropy (ΔSconfig ≈ 2.16 R) exhibit an ultrahigh recoverable energy density (Wrec) of ∼6.77 J/cm3 and an efficiency (η) of ∼86%. The enhanced ΔSconfig, as a consequence of introducing CHZ, results in a reduction of grain size from ∼0.89 μm at x = 0.00 to ∼0.32 μm at x = 0.20, along with an enhancement of the breakdown strength (BDS) from ∼200 kV/cm at x = 0.00 to ∼485 kV/cm at x = 0.15. Moreover, excellent frequency stability (<3.2%, ranging from 10 to 500 Hz), temperature stability (<6.4%, ranging from 25 to 140 °C), fatigue resistance (<4.0%, ranging from 1 to 105 cycles) and ultrafast discharge time (∼79 ns) are obtained in the optimal composition. The results demonstrate that the BNBKLT-0.15CHZ HEC has considerable potential for utilization in dielectric energy storage capacitors.","PeriodicalId":5,"journal":{"name":"ACS Applied Materials & Interfaces","volume":"102 1","pages":""},"PeriodicalIF":8.2000,"publicationDate":"2025-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Applied Materials & Interfaces","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1021/acsami.5c10550","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

Environmentally friendly dielectric ceramics with high energy storage are indispensable for advanced pulsed power capacitors, primarily due to their outstanding power density. Nevertheless, the relatively low energy storage performance (ESP) of these ceramics continues to limit their broader applications. Here, a series of lead-free (Bi0.2Na0.2Ba0.2K0.2La0.2)TiO3-xCa(Hf0.7Zr0.3)O3 high-entropy ceramics (abbreviated as BNBKLT-xCHZ HECs) was prepared based on a synergistic high-entropy design, aiming to achieve enhanced ESP. Remarkably, BNBKLT-0.15CHZ ceramics characterized by high configurational entropy (ΔSconfig ≈ 2.16 R) exhibit an ultrahigh recoverable energy density (Wrec) of ∼6.77 J/cm3 and an efficiency (η) of ∼86%. The enhanced ΔSconfig, as a consequence of introducing CHZ, results in a reduction of grain size from ∼0.89 μm at x = 0.00 to ∼0.32 μm at x = 0.20, along with an enhancement of the breakdown strength (BDS) from ∼200 kV/cm at x = 0.00 to ∼485 kV/cm at x = 0.15. Moreover, excellent frequency stability (<3.2%, ranging from 10 to 500 Hz), temperature stability (<6.4%, ranging from 25 to 140 °C), fatigue resistance (<4.0%, ranging from 1 to 105 cycles) and ultrafast discharge time (∼79 ns) are obtained in the optimal composition. The results demonstrate that the BNBKLT-0.15CHZ HEC has considerable potential for utilization in dielectric energy storage capacitors.

查看原文本刊更多论文

高熵工程（Bi0.2Na0.2Ba0.2K0.2La0.2）TiO3-xCa(Hf0.7Zr0.3)O3无铅陶瓷的优异储能性能

具有高能量存储的环保介质陶瓷是先进脉冲功率电容器必不可少的，主要是因为其出色的功率密度。然而，这些陶瓷相对较低的储能性能（ESP）继续限制其更广泛的应用。本文基于协同高熵设计，制备了一系列无铅（Bi0.2Na0.2Ba0.2K0.2La0.2）TiO3-xCa(Hf0.7Zr0.3)O3高熵陶瓷（简称BNBKLT-xCHZ HECs），旨在实现增强ESP。值得注意的是，具有高结构熵（ΔSconfig≈2.16 R）的BNBKLT-0.15CHZ陶瓷具有高达~ 6.77 J/cm3的超高可回收能量密度（Wrec）和高达~ 86%的效率（η）。由于引入CHZ，增强的ΔSconfig导致晶粒尺寸从x = 0.00时的~ 0.89 μm减小到x = 0.20时的~ 0.32 μm，同时击穿强度（BDS）从x = 0.00时的~ 200 kV/cm提高到x = 0.15时的~ 485 kV/cm。此外，在最佳组合物中获得了优异的频率稳定性（<3.2%，范围为10至500 Hz）、温度稳定性（<6.4%，范围为25至140°C）、抗疲劳性（<4.0%，范围为1至105次循环）和超快放电时间（~ 79 ns）。结果表明，BNBKLT-0.15CHZ HEC在介质储能电容器中具有相当大的应用潜力。

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

ACS Applied Materials & Interfaces 工程技术-材料科学：综合

CiteScore

16.00

自引率

6.30%

发文量

4978

审稿时长

1.8 months

期刊介绍： ACS Applied Materials & Interfaces is a leading interdisciplinary journal that brings together chemists, engineers, physicists, and biologists to explore the development and utilization of newly-discovered materials and interfacial processes for specific applications. Our journal has experienced remarkable growth since its establishment in 2009, both in terms of the number of articles published and the impact of the research showcased. We are proud to foster a truly global community, with the majority of published articles originating from outside the United States, reflecting the rapid growth of applied research worldwide.