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

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)Na 0.5 Bi 0.5 TiO 3-xCaZr 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. K E Y W O R D S dielectric materials/properties, energy storage, ferroelectricity/ferroelectric materials, lead-free ceramics, titanates How to cite this article: Bian S, Yue Z, Shi Y, Zhang J, Feng W. Ultrahigh energy storage density and charge-discharge performance in novel sodium bismuth titanate-based ceramics.

Energy storage performance of BiFeO3–SrTiO3–BaTiO3 relaxor ferroelectric ceramics

“…The process can be simply described as the dielectric capacitor is charged by an external electric field, then the stored electrostatic energy is discharged to a load resistor (13 kΩ in this work), and finally, the voltage or current across the load resistor is collected. 1 The discharged energy density (W d ) can be calculated according to the formula: 1,40…”

High‐energy storage density in NaNbO3‐modified (Bi0.5Na0.5)TiO3‐BiAlO3‐based lead‐free ceramics under low electric field

“…It can be seen that x = 0.14 sample exhibits excellent responsivity with ξ = 130.69 J/ (kV⋅m 2 ), which is superior to most other reported lead-free ceramics. 4,6,15,19,20,26,27,[45][46][47][48][49] To evaluate the temperature stability of energy storage properties, Figure 10 presents P-E loops of x = 0.14 composition measured in the temperature range of 30°C-180°C under 1 Hz and 10 kV/mm. Figure 10B temperature-dependent W rec and η.…”

“…Jiang et al 19 reported that a much enhanced energy storage density of 2.26 J/cm 3 was obtained in 0.8BNT–0.2Ba 0.3 Sr 0.7 TiO 3 ceramics through adding antiferroelectric composition NaNbO 3 (NN). Most recently, a high W rec of 4.77 J/cm 3 at 37.83 kV/mm was achieved in BNT ceramics with substituting low‐loss linear dielectrics CaZr 0.5 Ti 0.5 O 3 20 . Although great progress has been made in achieving high W re value of BNT‐based ceramics, this is almost realized under ultrahigh electric field E ( E > 20 kV/mm).…”

“…Most recently, a high W rec of 4.77 J/cm 3 at 37.83 kV/mm was achieved in BNT ceramics with substituting low-loss linear dielectrics CaZr 0.5 Ti 0.5 O 3 . 20 Although great progress has been made in achieving high W re value of BNT-based ceramics, this is almost realized under ultrahigh electric field E (E > 20 kV/mm). This may limit their applications under low electric field, such as in miniature dimensions, integrated electronic devices, and wearable or implanted devices.…”

Distorted Lattice Structure of La and Nd Co-Doped Bismuth Titanate Bi3-XTi4O12 Nano-Grained Ceramics for High Quality Energy Storage Application

“…Ferroelectric capacitors have rising applications in pulse power applications as energy storage devices due to their extremely short discharge time (microsecond level), such as medical fabrillator, hybrid electric vehicle, etc. [14][15][16][17]. The application of BIT ceramics in ferroelectric capacitive energy storage is noteworthy due to their excellent energy storage performance with high thermal stability and fatigue endurance [18,19].…”