Giant Capacitive Energy Storage in High-Entropy Lead-Free Ceramics with Temperature Self-Check

Xiangfu Zeng; Jinfeng Lin; Jie Shen; Yan Chen; Wei Xu; Luomeng Tang; Simin Wang; Min Gao; Chunlin Zhao; Tengfei Lin; Laihui Luo; Chao Chen; Baisheng Sa; Cong Lin; Xiao Wu; Jiwei Zhai

doi:10.1002/adma.202409059

Giant Capacitive Energy Storage in High-Entropy Lead-Free Ceramics with Temperature Self-Check

Adv Mater. 2024 Sep 19:e2409059. doi: 10.1002/adma.202409059. Online ahead of print.

Authors

Xiangfu Zeng¹, Jinfeng Lin^{2

3}, Jie Shen¹, Yan Chen¹, Wei Xu¹, Luomeng Tang³, Simin Wang³, Min Gao¹, Chunlin Zhao¹, Tengfei Lin¹, Laihui Luo⁴, Chao Chen⁵, Baisheng Sa¹, Cong Lin¹, Xiao Wu¹, Jiwei Zhai³

Affiliations

¹ Institute of Advanced Ceramics, College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, China.
² Strait Institute of Flexible Electronics (SIFE Future Technologies), Fujian Key Laboratory of Flexible Electronics, Fujian Normal University and Strait Laboratory of Flexible Electronics (SLoFE), Fuzhou, 350117, China.
³ 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.
⁴ Department of Microelectronic Science and Engineering, Ningbo University, Ningbo, 315211, China.
⁵ Jiangxi Key Laboratory of Advanced Ceramic Materials, School of Materials Science and Engineering, Jingdezhen Ceramic University, Jingdezhen, 333403, China.

PMID: 39300858
DOI: 10.1002/adma.202409059

Abstract

Considering the large demand for electricity in the era of artificial intelligence and big data, there is an urgent need to explore novel energy storage media with higher energy density and intelligent temperature self-check functions. High-entropy (HE) ceramic capacitors are of great significance because of their excellent energy storage efficiency and high power density (P_D). However, the contradiction between configurational entropy and polarization in traditional HE systems greatly restrains the increase in energy storage density. Herein, the contradiction is effectively solved by regulating the octahedral tilt and cationic displacement in ABO₃-type perovskite HE ceramics, i.e., (1-x)[0.6(Bi_0.47Na_0.47Yb_0.03Tm_0.01)TiO₃-0.4(Ba_0.5Sr_0.5)TiO₃]-xSr(Zr_0.5Hf_0.5)O₃ (BNYTT-BST-xSZH). Combining the tape-casting process and cold isostatic pressing, the optimal BNYTT-BST-0.06SZH ceramic displays a large recoverable energy storage density (10.46 J cm^-3) at 685 kV cm^-1 and a high P_D (332.88 MW cm^-3). More importantly, due to Tm/Yb codoping, abnormal fluorescent negative thermal expansion and excellent real-time temperature sensing are developed, thus the application of fault detection and warning in high-voltage transmission line systems is conceptualized. This study provides an effective strategy for enhancing the polarization of energy-storing HE ceramics and offers a promising material for overcoming the problems of insufficient capacitor density and thermal runaway in terminal communication.

Keywords: energy storage ceramics; fluorescent negative thermal expansion; high‐entropy (HE); octahedral tilt; relaxor ferroelectrics.

Abstract

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