A highly polarizable concentrated dipole glass for ultrahigh energy storage

Jian Fu, Aiwen Xie, Ruzhong Zuo (), Yiqian Liu, He Qi, Zongqian Wang, Quan Feng, Jinming Guo, Kun Zeng, Xuefeng Chen, Zhengqian Fu, Yifan Zhang, Xuewen Jiang, Tianyu Li, Shujun Zhang (), Yuan-Hua Lin () and Ce-Wen Nan ()
Additional contact information
Jian Fu: Hefei University of Technology
Aiwen Xie: Anhui Polytechnic University
Ruzhong Zuo: Hefei University of Technology
Yiqian Liu: Tsinghua University
He Qi: University of Science and Technology Beijing
Zongqian Wang: Anhui Polytechnic University
Quan Feng: Anhui Polytechnic University
Jinming Guo: School of Materials Science and Engineering, Hubei University
Kun Zeng: Chinese Academy of Sciences
Xuefeng Chen: Chinese Academy of Sciences
Zhengqian Fu: Chinese Academy of Sciences
Yifan Zhang: Hefei University of Technology
Xuewen Jiang: Anhui Polytechnic University
Tianyu Li: Anhui Polytechnic University
Shujun Zhang: University of Wollongong
Yuan-Hua Lin: Tsinghua University
Ce-Wen Nan: Tsinghua University

Nature Communications, 2024, vol. 15, issue 1, 1-10

Abstract: Abstract Relaxor ferroelectrics are highly desired for pulse-power dielectric capacitors, however it has become a bottleneck that substantial enhancements of energy density generally sacrifice energy efficiency under superhigh fields. Here, we demonstrate a novel concept of highly polarizable concentrated dipole glass in delicately-designed high-entropy (Bi1/3Ba1/3Na1/3)(Fe2/9Ti5/9Nb2/9)O3 ceramic achieved via substitution of multiple heterovalent ferroelectric-active principal cation species on equivalent lattice sites. The atomic-scaled polar heterogeneity of dipoles with different polar vectors between adjacent unit cells enables diffuse reorientation process but disables appreciable growth with electric fields. These unique features cause superior recoverable energy density of ~15.9 J cm−3 and efficiency of ~93.3% in bulk ceramics. We also extend the highly polarizable concentrated dipole glass to the prototype multilayer ceramic capacitor, which exhibits record-breaking recoverable energy density of ~26.3 J cm−3 and efficiency of ~92.4% with excellent temperature and cycle stability. This research presents a distinctive approach for designing high-performance energy-storage dielectric capacitors.

Date: 2024
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DOI: 10.1038/s41467-024-51766-z

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