Pulsed power and power electronics systems used in electric vehicles (EVs) demand high-speed charging and discharging capabilities, as well as a long lifespan for energy storage. To meet these requirements, ferroelectric dielectric capacitors are essential. We prepared lead-free ferroelectric ceramics with varying compositions of (1 − …
Highly transparent lead-free (1-x)K 0.5 Na 0.5 NbO 3 –xSr(Zn 1/3 Nb 2/3)O 3 (KNN–xSZN) ferroelectric ceramics have been synthesized via a conventional pressureless sintering method. All samples are optically clear, showing high transmittance in the visible and near-infrared regions (~70% and ~80% at 0.5 mm of thickness, respectively).
Large hysteresis and low energy density of pure AgNbO3 ceramics limit their further application in pulsed power techniques. Here, less-harmful Sm2O3-modified AgNbO3 antiferroelectric ceramics were synthesized by a rolling process, in order to improve the energy storage performance. All the Sm2O3-doped sample
In the past decade, lead-free, high energy density capacitors reported have either been RFE type (i.e., BF and NBT based) or AFE-type (i.e., AgNbO 3 based) dielectrics. Conventional LDs, such as CaZrO 3, Al 2 O 3, and CaTiO 3, are considered undesirable candidates for high energy MLCCs due to their low ɛ r (< 180), low P (< 0.1 C …
The development of energy storage devices with a high energy storage density, high power density, and excellent stability has always been a long-cherished goal for many researchers as they tackle issues concerning energy conservation and environmental protection. In this work, we report a novel BaTiO3-based
Journal of the American Ceramic Society (JACerS) is a leading ceramics journal publishing research across the field of ceramic and glass science and engineering. A new type of (0.7−x)Bi 0.5 Na 0.5 TiO 3-0.3Sr 0.7 Bi 0.2 TiO 3-xLaTi 0.5 Mg 0.5 O 3 (LTM1000x, x = 0.0, 0.005, 0.01, 0.03, 0.05 wt%) lead-free energy storage ceramic …
NaNbO3-based lead-free ceramics are gaining widespread interest in recent years due to their environmental friendliness and low density, which can meet the needs of future advanced pulse power electronics for low cost, miniaturization and integration. However, a reversible phase transition of FE-AFE at room temperature for …
The growing demand for high-power-density electric and electronic systems has encouraged the development of energy-storage capacitors with attributes such as high energy density, high capacitance density, high voltage and frequency, low weight, high-temperature operability, and environmental friendliness. Compared with their …
However, this mechanism to enhance the BDS may be popularized to lead free ceramics to improve their energy storage properties. And there were so many typical cases to support the mechanism, such as, the maximum recoverable energy storage density reached 1.72 J/cm 3 under 168 kV/cm for 0.95(0.93Bi 0.5 Na 0.5 TiO 3 …
Achieving high pulse charge-discharge energy storage properties and temperature stability of (Ba0.98-Li0.02La )(Mg0.04Ti0.96)O3 lead-free ceramics via bandgap and defect engineering Gui Yan Liqin Xu +4 authors Jianning Ding
Lead-free BaTiO3 (BT)-based multilayer ceramic capacitors (MLCCs) with the thickness of dielectric layers ~9 μm were successfully fabricated by tape-casting and screen-printing techniques. A single phase of the pseudo-cubic structure was revealed by X-ray diffraction. Backscattered images and energy-dispersive X-ray elemental mapping …
Achieving high pulse charge-discharge energy storage properties and temperature stability of (Ba0.98-xLi0.02Lax)(Mg0.04Ti0.96)O3 lead-free ceramics via bandgap and defect engineering Chem. Eng. J. (2022)
Based on the principle of sustainable development theory, lead-free ceramics are regarded as an excellent candidate in dielectrics for numerous pulsed power capacitor applications due to their outstanding thermal stability and environmental friendliness. However, the recoverable energy storage density (Wrec)
BF-based ceramic materials are considered as potential lead-free energy storage materials due to their theoretical high saturation polarization intensity and high Curie temperature [25,26]. However, the volatilization temperature of Bi 2 O 3 is low (∼825 °C), and the actual sintering temperature is often much higher than this temperature.
However, lead-free capacitors generally have a low-energy density, and high-energy density capacitors frequently contain lead, which is a key issue that hinders their broad application. In this review, we present perspectives and challenges for lead-free energy-storage MLCCs. Initially, the energy-storage mechanism and device characterization ...
To overcome this limitation here, lead-free ceramics comprising a layered structure are designed and fabricated. By optimizing the distribution of the layered structure, a large maximum polarization and high applied electric field (>500 kV cm −1 ) can be achieved; these result in an ultrahigh recoverable energy storage density (≈7 J cm −3 ) …
Dielectric capacitors with high energy storage density, good frequency/temperature stability, and fast charge-discharge capability are highly demanded in pulsed power systems. In this work, we design and prepare a novel lead-free 0.88BaTiO 3-0.12Bi(Li 1/3 Zr 2/3)O 3 (0.12BLZ) relaxor ferroelectric ceramic for dielectric capacitor …
Lead-free ceramic-based dielectric capacitors have attracted extensive investigation due to their potential applications in pulsed power devices. However, the main drawback of dielectric ceramics is the relatively low energy storage density. Herein, Bi 3+ and Mg 2+ with different ionic radius and valence are introduced into antiferroelectric …