Superior Energy-Storage Performance in Sandwich-Structured AgNbO3-Based Ceramics.

Regulating the switching electric field and energy-storage performance in antiferroelectric ceramics via heterogeneous laminated engineering

Superior energy-storage performances achieved in NaNbO3-based antiferroelectric ceramics by phase-structure and relaxation regulation

Lead‐based antiferroelectric (AFE) ceramics have attracted increasing interest in pulse power systems owing to their high‐energy storage and power densities. However, the single AFE–ferroelectric (FE) phase transition in conventional AFE materials usually leads to premature polarization saturation and low breakdown strength, which are disadvantageous to energy storage performance. In this study, high energy storage performance was achieved in Pb 0.94− x La 0.04 Ca x [Nb 0.02 (Zr 0.99 Ti 0.01 ) 0.975 ]O 3 (PLCNZT) AFE ceramics by constructing electric‐field‐induced multiple phase transitions. A maximum recoverable energy storage density of 12.15 J/cm 3 and a high energy efficiency of 85.4% were obtained for the PLCNZT ceramic with x = 0.03 at 420 kV/cm. These excellent properties are attributed to the AFE–FE Ⅰ‐FE Ⅱ multiple phase transitions induced by Ca 2+ doping, which effectively enhances the breakdown strength. This result indicates that field‐induced multiple phase transitions significantly improve the energy storage of AFE materials.

Antiferroelectric (AFE) materials demonstrate potential application in pulse power systems and energy-storage devices due to outstanding power density (PD) and rapid charge-discharge capability. Simultaneously achieving a high discharge energy density (Wdis) and large energy-storage density in AFE ceramics remains a key research focus. In this work, a method for optimizing parameters is proposed for ameliorating the grain size of the ceramic and enhancing antiferroelectricity, ultimately enhancing the energy-storage density and breakdown strength (Eb). Therefore, an excellent recoverable energy density (Wrec) of 13.6 J/cm3 and a large energy efficiency (η) of 82% along with outstanding thermal and frequency stabilities are simultaneously achieved in (Pb0.96La0.02Ca0.02)(Hf0.9Sn0.1)O3 (C1) AFE ceramics at a maximum electric field. The multistage field-induced phase transition phenomenon is detected at the polarization-electric field (P-E) hysteresis loop of the C1 ceramic. Meanwhile, a superior PD of 314.6 MW/cm3 and an excellent Wdis of 9.05 J/cm3 as well as a rapid discharge time (84 ns) are also obtained in the C1 ceramic at 380 kV/cm. The results highlight the potential of (Pb0.98-xLa0.02Cax)(Hf0.9Sn0.1)O3 AFE ceramics for pulsed power systems and energy-storage applications.

Antiferroelectric (AFE) ceramics exhibit significant potential for diverse applications in pulsed power capacitors, chiefly owing to their electric field-induced AFE-ferroelectric (FE) phase transitions. However, their lower intrinsic breakdown strength (BDS) frequently results in dielectric breakdown prior to the field-induced phase transition, critically undermining their energy storage performance. Herein, we introduced a high-performance PbHfO3 (PHO)-based AFE ceramic developed through a defect engineering strategy that successfully reduced the concentration of oxygen vacancies within the ceramic via non-equivalent substitution of Ta5+ ions in a high valence state. This approach not only mitigated the leakage current density associated with the migration of free electrons and ions but also improved the electrical homogeneity of the ceramic and curtailed grain growth, culminating in a substantial increase in BDS. Moreover, in terms of microstructure, the local chemical disorder was induced by this method facilitated dipole flipping, resulting in an increased maximum polarization (Pmax) and reduced hysteresis width. Consequently, the (Pb0.97La0.02)(Hf0.6Sn0.4)0.975Ta0.02O3 (PLHST2) ceramic achieved an exceptional energy storage density of approximately 13.15 J cm-3 and a high efficiency of around 83.6% at 680 kV cm-1. This accomplishment not only highlights the considerable potential of PHO-based AFE ceramics for use in pulsed capacitors but also paves the way for future advancements in the energy storage capabilities of dielectric ceramics.

Simultaneously achieving ultrahigh energy density and power density in PbZrO3-based antiferroelectric ceramics with field-induced multistage phase transition

Superior energy storage performance in antiferroelectric multilayer ceramics via heterogeneous interface structure engineering

PYN-based antiferroelectric ceramics with superior energy storage performance within an ultra-wide temperature range

Field-induced strain engineering to optimize antiferroelectric ceramics in breakdown strength and energy storage performance

Dielectric capacitors prepared by antiferroelectric (AFE) materials have the advantages of large power density and fast discharge ability. It has been a focus on the improvement of the recoverable energy density (Wrec) and discharge energy–density (Wdis) in the AFE ceramics. To address the above issue, optimizing the proportion of components is proposed for enhancing ceramic antiferroelectricity, ultimately improving the breakdown strength (Eb) and Wrec. In this work, an ultrahigh Wrec (14.3 J/cm3) with an excellent energy efficiency (η) of 81.1% is obtained in (Pb0.96Sr0.02La0.02)(Hf0.9Sn0.1)O3 AFE ceramic at electric field of 490 kV/cm, which is the maximum value reported in lead-based AFE ceramics fabricated by the conventional solid-state reaction method so far. The multistage phase transition induced by the electric field is observed in the polarization–electric field (P–E) hysteresis loops. Furthermore, an outstanding power density (PD) of 335 MW/cm3 and an excellent Wdis of 8.97 J/cm3 with a rapid discharge speed (102 ns) are obtained at electric field of 390 kV/cm. In addition, (Pb0.96Sr0.02La0.02)(Hf0.9Sn0.1)O3 ceramics also possess an excellent thermal and frequency stability. These exceptional properties indicate that (Pb0.98−xSrxLa0.02)(Hf0.9Sn0.1)O3 ceramics are a potential candidate for pulsed power devices and power electronic devices.

Achieving high energy storage performance and ultrafast discharge speed in SrTiO3-based ceramics via a synergistic effect of chemical modification and defect chemistry

Stepwise-design activated high capacitive energy storage in lead-free NaNbO3-based relaxor antiferroelectric ceramics

The energy storage performance of antiferroelectric ceramic capacitors has always gain much attention. Hysteresis, transition field, and polarization intensity are crucial factors influencing energy storage performance. A‐site doped small radius ions have been shown in numerous investigations to enhance the switching field, minimize hysteresis, but decrease maximum polarization intensity. How to maintain the high polarization while optimizing other parameters is a great challenge, and this problem has received scant attention in the research literature to date. In this work, Pb 1‐x Sr x (Zr 0.54 Sn 0.46 ) 0.975 Nb 0.02 O 3 (x = 0, 0.02, 0.06, 0.08, 0.1, 0.12, 0.14, 0.16, 0.20) antiferroelectric ceramics show high polarization stability. When the Sr 2+ content is within 12 mol%, the saturation polarization intensity always remains at a large value (> 44μC/cm 2 ), and the rate of change is as low as 6%. Pb 0.92 Sr 0.08 (Zr 0.54 Sn 0.46 ) 0.975 Nb 0.02 O 3 also displays great polarization temperature stability with a minimal change rate of 8.5% in a wide temperature range from ‐55 to 85°C. Additionally, this ceramic also has a superior energy storage performance that the recoverable energy density and energy storage efficiency and 8.95 J/cm 3 and 80.4%, respectively. This work paves the way for practical simultaneous polarization and other parameter optimization.

Significantly enhancing energy storage performances of flexible dielectric film by introducing poly(1,4-anthraquinone)

Lead-based antiferroelectric (AFE) ceramics have the advantages of high power density, fast charge and discharge speed, and the electric-field-induced AFE-FE phase transition, making them one of the potential dielectric energy storage materials. However, the energy storage density still needs to be improved. In this work, (Pb1-xCax) (Zr0.55Sn0.45)O3 (PCZS, x = 0.01, 0.02, 0.03 and 0.04) antiferroelectric ceramics were successfully prepared using the solid-state reaction and two-step sintering methods. The results showed that as the Ca2+ content increased, the average grain size decreased from 1.38 ± 0.42 to 1.06 ± 0.35 μm and the dielectric breakdown strength increased from 270 to 325 kV/cm for ceramics with 80 μm in thickness. Two kinds of superlattice structures (F-point with 1/2{ooo} patterns and incommensurate modulation structure (IMS) pattern with 1/n{110} patterns) were observed, indicating the typical octahedral tilting-related AFE structure. The (Pb0.98Ca0.02) (Zr0.55Sn0.45)O3 bulk ceramics, due to the refined polarization-electric field hysteresis loop of the IMS, achieved a maximum recoverable energy storage density (Wrec) of 6.61 J/cm3 with an efficiency (η) of 84.01%. In the circuit of charge-discharge to a load, an ultrahigh power density (PD) of 276.67 MW/cm3 and a discharged energy density (Wdis) of 6.24 J/cm3 were obtained in PCZS2 bulk ceramics at 290 kV/cm. The high Wrec and Wdis indicate that PCZS ceramics offer potential applications in the field of pulse-power electric devices.