中国物理B ›› 2022, Vol. 31 ›› Issue (9): 97701-097701.doi: 10.1088/1674-1056/ac5393

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Efficiently enhanced energy storage performance of Ba2Bi4Ti5O18 film by co-doping Fe3+ and Ta5+ ion with larger radius

Qiong Wu(吴琼), Lei Zhao(赵雷), Xinghao Chen(陈兴豪), and Shifeng Zhao(赵世峰)   

  1. Inner Mongolia Key Laboratory of Nanoscience and Nanotechnology, &School of Physical Science and Technology, Inner Mongolia University, Hohhot 010021, China
  • 收稿日期:2021-11-26 修回日期:2022-01-17 接受日期:2022-02-10 出版日期:2022-08-19 发布日期:2022-08-24
  • 通讯作者: Shifeng Zhao E-mail:zhsf@imu.edu.cn
  • 基金资助:
    This work was financially supported by the National Natural Science Foundation of China (Grant Nos. 12074204, 11864028, and 11904054) and the Natural Science Foundation of Inner Mongolia, China (Grant No. 2022ZD06).

Efficiently enhanced energy storage performance of Ba2Bi4Ti5O18 film by co-doping Fe3+ and Ta5+ ion with larger radius

Qiong Wu(吴琼), Lei Zhao(赵雷), Xinghao Chen(陈兴豪), and Shifeng Zhao(赵世峰)   

  1. Inner Mongolia Key Laboratory of Nanoscience and Nanotechnology, &School of Physical Science and Technology, Inner Mongolia University, Hohhot 010021, China
  • Received:2021-11-26 Revised:2022-01-17 Accepted:2022-02-10 Online:2022-08-19 Published:2022-08-24
  • Contact: Shifeng Zhao E-mail:zhsf@imu.edu.cn
  • Supported by:
    This work was financially supported by the National Natural Science Foundation of China (Grant Nos. 12074204, 11864028, and 11904054) and the Natural Science Foundation of Inner Mongolia, China (Grant No. 2022ZD06).

摘要: We present an efficient strategy, that is the co-substitution of Fe3+ and Ta5+ ions with large radius for Ti4+ ion, to enhance energy storage performance of Ba2Bi4Ti5O18 film. For the films co-doped with Fe3+ and Ta5+ ions, the maximum polarization under the same external electric field is improved because the radius of Fe3+ and Ta5+ ions is larger than that of Ti4+ ion. Moreover, due to the composition and chemical disorder, the relaxor properties are also slightly improved, which can not be achieved by the film doped with Fe3+ ions only. What is more, for the films doped with Fe3+ ion only, the leakage current density increases greatly due to the charge imbalance, resulting in a significant decrease in breakdown strength. It is worth mentioning that the breakdown strength of Fe3+ and Ta5+ ions co-doped film does not decrease due to the charge balance. Another important point is the recoverable energy storage density of the films co-doped with Fe3+ and Ta5+ ions has been greatly improved based on the fact that the maximum external electric field does not decrease and the maximum polarization under the same external electric field increases. On top of that, the hysteresis of the polarization has also been improved. Finally, the co-doped films with Fe3+ and Ta5+ ions have good frequency and temperature stability.

关键词: Ba2Bi4Ti5O18 film, ferroelectrics, energy storage, co-doped, radius

Abstract: We present an efficient strategy, that is the co-substitution of Fe3+ and Ta5+ ions with large radius for Ti4+ ion, to enhance energy storage performance of Ba2Bi4Ti5O18 film. For the films co-doped with Fe3+ and Ta5+ ions, the maximum polarization under the same external electric field is improved because the radius of Fe3+ and Ta5+ ions is larger than that of Ti4+ ion. Moreover, due to the composition and chemical disorder, the relaxor properties are also slightly improved, which can not be achieved by the film doped with Fe3+ ions only. What is more, for the films doped with Fe3+ ion only, the leakage current density increases greatly due to the charge imbalance, resulting in a significant decrease in breakdown strength. It is worth mentioning that the breakdown strength of Fe3+ and Ta5+ ions co-doped film does not decrease due to the charge balance. Another important point is the recoverable energy storage density of the films co-doped with Fe3+ and Ta5+ ions has been greatly improved based on the fact that the maximum external electric field does not decrease and the maximum polarization under the same external electric field increases. On top of that, the hysteresis of the polarization has also been improved. Finally, the co-doped films with Fe3+ and Ta5+ ions have good frequency and temperature stability.

Key words: Ba2Bi4Ti5O18 film, ferroelectrics, energy storage, co-doped, radius

中图分类号:  (Ferroelectricity and antiferroelectricity)

  • 77.80.-e
68.55.-a (Thin film structure and morphology) 84.60.Ve (Energy storage systems, including capacitor banks)