J. Mater. Sci. Technol. ›› 2024, Vol. 184: 207-220.DOI: 10.1016/j.jmst.2023.10.036

• Research article • Previous Articles     Next Articles

Preeminent energy storage properties and superior stability of (Ba(1-x)Bix)(Ti(1-x)Mg2x/3Tax/3)O3 relaxor ferroelectric ceramics via elongated rod-shaped grains and domain structural regulation

Ming Yina,1, Ying Zhanga,1, Hai-Rui Baib,*, Peng Lia, Yu-Chao Lia, Wei-Fang Hana, Ji-Gong Haoa, Wei Lia,*, Chun-Ming Wangc, Peng Fua,c,**   

  1. aSchool of Materials Science and Engineering, Liaocheng University, Liaocheng 252059, China;
    bShandong Laboratory of Yantai Advanced Materials and Green Manufacturing, Yantai 264006, China;
    cSchool of Physics, Shandong University, Jinan 250100, China
  • Received:2023-08-17 Revised:2023-10-08 Accepted:2023-10-15 Published:2024-06-10 Online:2023-12-07
  • Contact: **School of Physics, Shandong University, Jinan 250100, China. E-mail addresses: fupeng9806@126.com (P. Fu);*E-mail addresses: greenbhr@amgm.ac.cn (H.-R. Bai), liwei@lcu.edu.cn (W. Li).
  • About author:1These authors contribute equally to this work.

Abstract: (Ba(1-x)Bix)(Ti(1-x)Mg2x/3Tax/3)O3 (BBTMT-x, x = 0.075, 0.1, 0.125, and 0.15) ceramics were manufactured via a solid-phase reaction method. The pseudo-cubic BaTiO3 (BT) as the primary phase and Ba4MgTi11O27 as the secondary phase were detected in BBTMT-x ceramics. The elongated rod-shaped grains therein became numerous as x increased. The introduction of Bi/Mg/Ta (BMT) elements transformed BT ceramics from ferroelectrics to relaxor ferroelectrics and induced the formation of short-range order polar nanoregions (PNRs), which were beneficial for the preeminent energy storage properties (ESPs). The highest ESPs (a giant recoverable energy-storage density Wrec of 5.97 J cm-3 with a high-efficiency η of 87.4%) were achieved in BBTMT-0.1 ceramics at 710 kV cm-1. BBTMT-0.1 ceramics also possessed excellent frequency (1-500 Hz), temperature (30-150 °C), and fatigue (cycle number of 1-100,000) stabilities. Finite element simulations (FES) demonstrated that elongated rod-shaped grains had stronger obstacles to the development of electrical branches, which was beneficial to improving the comprehensive ESPs.

Key words: Ceramics, Relaxor ferroelectrics, Energy storage, Polar nanoregions, Stability