Ultrahigh Energy Storage Density and High Efficiency in Lead-Free (Bi0.9Na0.1)(Fe0.8Ti0.2)O3-Modified NaNbO3 Ceramics via Stabilizing the Antiferroelectric Phase and Enhancing Relaxor Behavior

Jiajun Ma; Donghai Zhang; Fei Ying; Xiongjie Li; Ling Li; Shun Guo; Yu Huan; Ji Zhang; Jing Wang; Shan-Tao Zhang

doi:10.1021/acsami.2c02086

Ultrahigh Energy Storage Density and High Efficiency in Lead-Free (Bi_0.9Na_0.1)(Fe_0.8Ti_0.2)O₃-Modified NaNbO₃ Ceramics via Stabilizing the Antiferroelectric Phase and Enhancing Relaxor Behavior

ACS Appl Mater Interfaces. 2022 May 4;14(17):19704-19713. doi: 10.1021/acsami.2c02086. Epub 2022 Apr 20.

Authors

Jiajun Ma¹, Donghai Zhang¹, Fei Ying¹, Xiongjie Li², Ling Li¹, Shun Guo¹, Yu Huan³, Ji Zhang¹, Jing Wang⁴, Shan-Tao Zhang⁵

Affiliations

¹ School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
² Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China.
³ School of Material Science and Engineering, University of Jinan, Jinan 250022, China.
⁴ State Key Laboratory of Mechanics and Control of Mechanical Structures, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.
⁵ National Laboratory of Solid State Microstructures, Department of Materials Science and Engineering, College of Engineering and Applied Science & Jiangsu Key Laboratory of Artificial Functional Materials & Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China.

PMID: 35442644
DOI: 10.1021/acsami.2c02086

Abstract

Dielectric capacitors have attracted growing attention because of their important applications in advanced high power and/or pulsed power electronic devices. Nevertheless, the synergistic enhancement of recoverable energy storage density (W_rec > 10 J/cm³) and efficiency (η > 80%) is still a great challenge for lead-free dielectric bulk ceramics. Herein, by introducing complex perovskite compound (Bi_0.9Na_0.1)(Fe_0.8Ti_0.2)O₃ with a smaller tolerance factor into an NaNbO₃ matrix (NN-BNFT), we have achieved and explored stable relaxor antiferroelectric ceramics with enhanced relaxor behavior. Of particular importance is the composition of 0.88NN-0.12BNFT, which exhibits a large electric breakdown strength E_b of 87.3 kV/mm, an ultrahigh W_rec of 12.7 J/cm³, and a high efficiency η of 82.5%, as well as excellent thermal reliability and an ultrafast discharge speed, resulting from the dense microstructure, the moderate dielectric constant, the reduced grain size, the dielectric loss, and the sample thickness. The outstanding energy storage properties of NN-BNFT display great promise in advanced dielectric capacitors for energy storage applications.

Keywords: NaNbO3; charge−discharge property; energy storage properties; lead-free; relaxor antiferroelectric.