A polarization double-enhancement strategy to achieve super low energy consumption with ultra-high energy storage capacity in BCZT-based relaxor ferroelectrics

Zixiong Sun; Yuhan Bai; Hongmei Jing; Tianyi Hu; Kang Du; Qing Guo; Pan Gao; Ye Tian; Chunrui Ma; Ming Liu; Yongping Pu

doi:10.1039/d4mh00322e

A polarization double-enhancement strategy to achieve super low energy consumption with ultra-high energy storage capacity in BCZT-based relaxor ferroelectrics

Mater Horiz. 2024 Apr 29. doi: 10.1039/d4mh00322e. Online ahead of print.

Authors

Zixiong Sun^{1

2

3

4}, Yuhan Bai¹, Hongmei Jing⁵, Tianyi Hu⁶, Kang Du⁷, Qing Guo¹, Pan Gao¹, Ye Tian⁸, Chunrui Ma⁶, Ming Liu⁹, Yongping Pu⁸

Affiliations

¹ School of Electronic Information and Artificial Intelligence, Shaanxi University of Science and Technology, Xi'an 710021, P. R. China. SunZX@sust.edu.cn.
² Hubei Key Laboratory of Micro-Nanoelectronic Materials and Devices, Hubei University, Wuhan 430062, China.
³ Shaanxi Collaborative Innovation Center of Industrial Auxiliary Chemistry and Technology, Shaanxi University of Science and Technology, Xi'an 710021, China.
⁴ MESA+ Institute for Nanotechnology, University of Twente, PO Box 217, Enschede 7500 AE, The Netherlands.
⁵ School of Physics and Information Technology, Shaanxi Normal University, Xi'an, 710119, P. R. China. jhmei.dengdai@snnu.edu.cn.
⁶ State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, China.
⁷ School of Mathematical and Physical Sciences, Wuhan Textile University, Wuhan, 430200, China.
⁸ School of Materials Science and Engineering, Shaanxi University of Science and Technology, Xi'an 710021, P. R. China. puyongping@sust.edu.cn.
⁹ School of Microelectronics, Xi'an Jiaotong University, Xi'an, China. m.liu@xjtu.edu.cn.

PMID: 38682657
DOI: 10.1039/d4mh00322e

Abstract

Due to dielectric capacitors' already-obtained fast charge-discharge speed, research has been focused on improving their W_rec. Increasing the polarization and enhancing the voltage endurance are efficient ways to reach higher W_rec, however simultaneous modification still seems a paradox. For example, in the ferroelectric-to-relaxor ferroelectric (FE-to-RFE) phase transition strategy, which has been widely used in the latest decade, electric breakdown strength (E_b) and energy storage efficiency (η) always increase, while at the same time, the maximum polarization (P_max) inevitably decreases. The solution to this problem can be obtained from another degree of freedom, like defect engineering. By incorporating Bi(Zn_2/3Ta_1/3)O₃ (BZT) into the Ba_0.15Ca_0.85Zr_0.1Ti_0.9O₃ (BCZT) lattice to form (1 - x)Ba_0.15Ca_0.85Zr_0.1Ti_0.9O₃-xBi(Zn_2/3Ta_1/3)O₃ (BCZT-xBZT) solid-solution ceramics, in this work, ultrahigh ferroelectric polarization was achieved in BCZT-0.15BZT, which is caused by the polarization double-enhancement, comprising the contribution of interfacial and dipole polarization. In addition, due to the electron compensation, a Schottky contact formed at the interface between the electrode and the ceramic, which in the meantime, enhanced its E_b. A W_rec of 8.03 J cm^-3, which is the highest among the BCZT-based ceramics reported so far, with an extremely low energy consumption, was finally achieved. BCZT-0.15BZT also has relatively good polarization fatigue after long-term use, good energy storage frequency stability and thermal stability, as well as excellent discharge properties.