Achieved ultrahigh energy storage properties and outstanding charge–discharge performances in (Na0.5Bi0.5)0.7Sr0.3TiO3-based ceramics by introducing a linear additive

Improvement of dielectric and energy storage properties in Sr0.85Bi0.1ZrO3 modified (Bi0.5Na0.5)0.7Sr0.3TiO3 lead-free ceramics

Improved energy storage density and efficiency of (1−x)Ba0.85Ca0.15Zr0.1Ti0.9O3-xBiMg2/3Nb1/3O3 lead-free ceramics

Achieving excellent energy storage properties of Na0.5Bi0.5TiO3 - based ceramics by using a two-step strategy involving phase and polarization modification

Synchronously enhancing energy storage density, efficiency and power density under low electric field in lead-free ferroelectric (1-x)(Bi0.5Na0.5)0.7Sr0.3TiO3-xSr1/2La1/3(Ti0.7Zr0.3)O3 ceramics

Lead-free dielectric capacitors have attracted significant research interest for high-power applications due to their environmental benefits and ability to meet the demanding performance requirements of electronic devices. However, the development of lead-free ceramic dielectrics with outstanding energy storage performance remains a challenge. In this study, environmentally friendly ceramic dielectrics with sandwich structures are designed and fabricated to improve energy storage performance via the synergistic effect of different dielectrics. The chemical compositions of the outer and middle layers of the sandwich structure are 0.35BiFeO3 -0.65SrTiO3 and Bi0.39 Na0.36 Sr0.25 TiO3 , respectively. The experimental and theoretical simulation results demonstrate that the breakdown strength is over 700kVcm-1 for prepare sandwich structure ceramics. As a result, an ultrahigh recoverable energy storage density of 9.05Jcm-3 and a near-ideal energy storage efficiency of 97% are simultaneously achieved under 710kVcm-1 . Furthermore, the energy storage efficiency maintains high values (≥ 96%) within 1-100Hz and the power density as high as 188MWcm-3 under 400kVcm-1 . These results indicate that the designed lead-free ceramics with a sandwich structure possess superior comprehensive energy storage performance, making them promising lead-free candidates in the energy storage field.

Achieving ultrahigh energy storage properties with superior stability in novel (Ba(1-x)Bix)(Ti(1-x)Zn0.5xSn0.5x)O3 relaxor ferroelectric ceramics via chemical modification

High energy storage performance for flexible PbZrO3 thin films by seed layer engineering

Enhancement of energy storage performances in BaTiO3-based ceramics via introducing Bi(Mg2/3Sb1/3)O3

An ultrahigh energy storage density in lead-free Na0.5Bi0.5TiO3-NaNbO3 based ceramics via multiple optimization strategies

Dielectric capacitors with ultrafast charge-discharge rates are extensively used in electrical and electronic systems. To meet the growing demand for energy storage applications, researchers have devoted significant attention to dielectric ceramics with excellent energy storage properties. As a result, the awareness of the importance of the pulsed discharge behavior of dielectric ceramics and conducting characterization studies has been raised. However, the temperature stability of pulsed discharge behavior, which is significant for pulsed power applications, is still not given the necessary consideration. Here, we systematically investigate the microstructures, energy storage properties and discharge behaviors of nanograined (1-x)BaTiO3-xNaNbO3 ceramics prepared by a two-step sintering method. The 0.60BaTiO3-0.40NaNbO3 ceramics with relaxor ferroelectric characteristics possess an optimal discharge energy density of 3.07 J cm-3, a high energy efficiency of 92.6%, an ultrafast discharge rate of 39 ns and a high power density of 100 MW cm-3. In addition to stable energy storage properties in terms of frequency, fatigue and temperature, the 0.60BaTiO3-0.40NaNbO3 ceramics exhibit temperature-stable power density, thereby illustrating their significant potential for power electronics and pulsed power applications.

Ceramic dielectric capacitors have gained significant attention due to their ultrahigh power density, current density, and ultrafast charge-discharge speed. However, their potential applications have been limited by their relatively low energy storage density. Researchers have employed various approaches to enhance their energy storage density. In this study, (1 - x)(Bi0.5Na0.5)0.7Sr0.3TiO3-xCa(Mg1/3Ta2/3)O3 ceramics were prepared via a solid-phase reaction, and the effect of their structure on the energy storage properties was investigated. The results indicate that the introduction of Ca(Mg1/3Ta2/3)O3 significantly alters the multiscale structures of the (Bi0.5Na0.5)0.7Sr0.3TiO3 ceramic, including the transformation from the T-phase to the C-phase, refinement of ceramic grains, and the formation of polar nanoregions (PNRs), accompanied by an increase in the bandgap and relaxation degree. These structural changes collectively contributed to the improved overall energy storage properties of the modified ceramics. Notably, the 0.92(Bi0.5Na0.5)0.7Sr0.3TiO3-0.08Ca(Mg1/3Ta2/3)O3 ceramic demonstrated a recoverable energy storage density (Wrec) of 8.37 J/cm3 with an energy storage efficiency (η) of 87.7% at an electric field of 530 kV/cm. It also exhibited good temperature stability (25-120 °C), frequency stability (1-100 Hz), and fatigue stability (1-105). Furthermore, it displayed exceptional charge and discharge properties, with the discharge energy density (WD), discharge time (t0.9), current density (CD), and power density (PD) attaining 4.06 J/cm3, 35.2 ns, 2143.28 A/cm2, and 460.71 MW/cm3, respectively. These findings suggest that modified (1 - x)(Bi0.5Na0.5)0.7Sr0.3TiO3-xCa(Mg1/3Ta2/3)O3 ceramics are promising candidates for high-power pulsed electronic systems.

Ultra-high energy storage performance in Bi5Mg0.5Ti3.5O15 film via a low temperature-induced ergodic relaxation state

Improvement of energy storage density with trace amounts of ZrO2 additives fabricated by wet-chemical method

In recent years, polymer-based dielectric capacitors have attracted much more attention due to the advantages of excellent flexibility, light weight, and high power density. However, most studies focus on energy storage performances of polymer-based dielectrics at room temperature, and there have been relatively fewer investigations on polymer-based dielectrics working under high-temperature conditions, which is much closer to the practical applications. Besides, dielectric capacitors operating in a high-temperature environment require excellent temperature stability of structure and performance. In this paper, high-temperature-resistant polyimide (PI) is selected as the matrix material, and 0.5Ba(Zr0.2Ti0.8)O3–0.5(Ba0.7Ca0.3)TiO3 (BZT–BCT) nanofibers are used as the filling phase. By analyzing the energy storage behaviors of BZT–BCT/PI composites at different temperatures, it can be found that when the doping content of BZT–BCT nanofibers is more than 1 vol % the dielectric strength of the composites drops sharply when the temperature increases from 25 to 150 °C, resulting in serious deterioration of energy storage properties. On the basis of this, a composite film with a sandwich structure has been designed, where BZT–BCT/PI with different volume fractions is the intermediate layer and hexagonal boron nitride (h-BN) with good thermal and insulating properties is introduced in the top and bottom layers with a content of 5 vol %. Consequently, the results have shown that the energy storage properties of the constructed sandwiched dielectric composite films exhibit excellent temperature stability. The maximum field strength of the composite film with a BZT–BCT content of 1 vol % in the intermediate layer is 360 and 350 kV/mm under temperatures of 25 and 150 °C, and the storage density is 2.3 and 1.83 J/cm3 respectively.

The energy storage properties of the 0.72Bi0.5Na0.5TiO3-0.28SrTiO3 system have been heavily investigated; however, achieving both high recoverable energy storage density (Wr) and large energy efficiency (η) remains a challenge. In this study, relaxor ferroelectric ceramics exhibiting high Wr and η were prepared by introducing BaSnO3 into 0.9(Bi0.5Na0.5)0.72Sr0.28TiO3-0.1Bi(Mg0.5Ti0.5)O3 relaxor ceramics. A remarkable Wr of 7.5 J/cm3 and η of 91.2% were achieved in the 0.94[0.9(Bi0.5Na0.5)0.72Sr0.28TiO3-0.1Bi(Mg0.5Ti0.5)O3]-0.06BaSnO3 ceramic at an electric field of 460 kV/cm. The η and the energy storage potential (Wr/Eb), respectively, surpass those reported for most ceramics in recent years. The introduction of high-temperature-stable BaSnO3 imparted excellent temperature and frequency stability to the ceramic. The ceramic exhibited a Wr of 3.6 J/cm3 and an η of 79.6% at 160 °C and 265 kV/cm. The sample has a power density of 202.8 MW/cm3, an energy density of 2.2 J/cm3 at an electric field of 260 kV/cm, and a fast charge–discharge capability.