Temperature stability lock of high-performance lead-free relaxor ferroelectric ceramics

被引：0

作者：

Wang, Simin ^{[1
,2
,3
]}

Yan, Fei ^{[4
]}

Qian, Jin ^{[1
]}

Ge, Guanglong ^{[1
]}

Fu, Zhengqian ^{[5
]}

Pan, Zhongbin ^{[6
]}

Zhang, Faqiang ^{[2
]}

Lin, Jinfeng ^{[1
]}

Zeng, Kun ^{[5
]}

Chen, Chukai ^{[1
]}

Shen, Bo ^{[1
]}

Liu, Zhifu ^{[2
,3
]}

Zhai, Jiwei ^{[1
]}

机构：

[1] Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Functional Materials Research Laboratory, School of Materials Science and Engineering, Tongji University, Shanghai,201804, China

[2] The Key Lab of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai,200050, China

[3] Center of Materials Science and Optoelectronics Engineering, University of the Chinese Academy of Sciences, Beijing, 100049, China

[4] School of Advanced Materials and Nanotechnology, Xidian University, Xi'an,710126, China

[5] State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai,200050, China

[6] School of Materials Science and Chemical Engineering, Ningbo University, Ningbo,315211, China

来源：

Energy Storage Materials | 2024年 / 66卷

关键词：

Ferroelectric materials - Ferroelectricity - High temperature applications - Locks (fasteners) - Phase composition - Storage (materials) - Thermodynamic stability;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Lead-free dielectric ceramics are considered a highly promising material for pulse power capacitors due to their excellent energy storage performance. However, it is challenging to achieve high-temperature energy storage performance of dielectric ceramics to meet the needs of practical applications. Here, an effective strategy for constructing temperature stability lock is designed to regulate the phase composition and temperature stability based on the polymorphic polarization structure. By realizing the ergodic-state-dominated metastable relaxation structure, high energy storage performance and temperature-insensitive structure can be achieved in relaxor ferroelectric ceramics. Taking the Bi0.5Na0.5TiO3-based solid solution as an example, we demonstrate the metastable relaxation structure induced by the proportion of phase composition. This leads to a large recoverable energy density (Wrec) of 10.7 J cm−3 and a high efficiency (η) of 91 %. Together with the good thermal stability of Wrec (7.1 ± 0.1 J cm−3) and η (86 ± 5 %) values at 500 kV cm−1 in the temperature range from 20 °C to 200 °C, outperforming all reported Bi0.5Na0.5TiO3-based energy storage ceramics. Our work provides a method for obtaining lead-free dielectric ceramics with high-temperature energy storage performance through temperature stability lock. © 2024 Elsevier B.V.

引用