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Ultrahigh energy storage density and charge‐discharge performance in novel sodium bismuth titanate‐based ceramics
Author(s) -
Bian Shuaishuai,
Yue Zhenxing,
Shi Yunzhou,
Zhang Jie,
Feng Wei
Publication year - 2021
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.17486
Subject(s) - materials science , energy storage , ceramic , dielectric , capacitor , ferroelectricity , bismuth , power density , bismuth titanate , analytical chemistry (journal) , optoelectronics , voltage , composite material , electrical engineering , power (physics) , chemistry , thermodynamics , metallurgy , physics , chromatography , engineering
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 )Na 0.5 Bi 0.5 TiO 3 ‐ x CaZr 0.5 Ti 0.5 O 3 (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/cm 3 ), high recoverable energy storage density (4.77 and 4.37 J/cm 3 ), 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 10 5 . Additionally, the NBT‐CZT ceramics had a fast discharge speed ( t 0.9 < 100 ns) and high power density (24.2 MW/cm 3 , 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.