Volume 104, Issue 2 p. 936-947
ORIGINAL ARTICLE

Ultrahigh energy storage density and charge-discharge performance in novel sodium bismuth titanate-based ceramics

Shuaishuai Bian

Shuaishuai Bian

State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, China

Search for more papers by this author
Zhenxing Yue

Corresponding Author

Zhenxing Yue

State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, China

Correspondence

Zhenxing Yue, State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.

Email: [email protected]

Jie Zhang, Department of Materials Application, AVIC Manufacturing Technology Research Institute, Beijing 100024, China.

Email: [email protected]

Search for more papers by this author
Yunzhou Shi

Yunzhou Shi

State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, China

Search for more papers by this author
Jie Zhang

Corresponding Author

Jie Zhang

Department of Materials Application, AVIC Manufacturing Technology Research Institute, Beijing, China

Correspondence

Zhenxing Yue, State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.

Email: [email protected]

Jie Zhang, Department of Materials Application, AVIC Manufacturing Technology Research Institute, Beijing 100024, China.

Email: [email protected]

Search for more papers by this author
Wei Feng

Wei Feng

State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, China

Search for more papers by this author
First published: 22 September 2020
Citations: 30

Abstract

Lead-free ferroelectric ceramics are very suitable for electrostatic energy storage capacitors due to their outstanding characteristics of high charge-discharge speed, high power density, and environmental friendliness. Herein, a novel material system as (1−x)Na0.5Bi0.5TiO3-xCaZr0.5Ti0.5O3 (NBT-CZT, x = 0, 0.05, 0.10, 0.12, 0.15, and 0.20) was designed and prepared for dielectric energy storage ceramics. It demonstrated that the CZT additives induced a phase transition for the NBT ceramics, from ferroelectric to relaxor ferroelectric. In particular, extremely high stored energy storage density (6.92 and 5.37 J/cm3), high recoverable energy storage density (4.77 and 4.37 J/cm3), and moderate efficiency (69.0% and 81.4%) were achieved in both the samples of x = 0.12 and x = 0.15, respectively. The ceramics exhibited excellent stability of energy storage performance covering a wide temperature (25°C–200°C) and frequency (0.5–50 Hz) range, and also fatigue cycles up to 105. Additionally, the NBT-CZT ceramics had a fast discharge speed (t0.9 < 100 ns) and high power density (24.2 MW/cm3, E = 100 kV/cm, x = 0.15), and the charge-discharge process remained stable even when the measured temperature was up to 160°C. Therefore, the NBT-CZT ceramics have the potential to be utilized in electrostatic energy storage applications.