Tunable Domain Switching Features of Incommensurate Antiferroelectric Ceramics Realizing Excellent Energy Storage Properties

Abstract

An incommensurate modulated antiferroelectric phase is a key part of ideal candidate materials for the next generation of dielectric ceramics with excellent energy storage properties. However, there is less research carried out when considering its relatively low polarization response. Here, the incommensurate phase is modulated by stabilizing the antiferroelectric phase and the energy storage performance of the incommensurate phase under ultrahigh electric field is studied. The tape‐casting method is applied to construct dense and thin ceramics. La3+ doping induces a room‐temperature incommensurate antiferroelectric orthorhombic matrix. With little Cd2+, the extremely superior energy storage performances arose as follows: when 0.03, the recoverable energy storage density reaches ≈19.3 J cm‐3, accompanying an ultrahigh energy storage efficiency of ≈91% (870 kV cm‐1); also, a giant discharge energy density of ≈15.4 J cm‐3 emerges during actual operation. In situ observations demonstrate that these superior energy storage properties originate from the phase transition from the incommensurate antiferroelectric orthorhombic phase to the induced rhombohedral relaxor ferroelectric one. The adjustable incommensurate period affects the depolarization response. The revealed phase‐transition mechanism enriches the existing antiferroelectric–ferroelectric transition. Attention to the incommensurate phase can provide a reference for the selection of the next generation of high‐performance antiferroelectric materials.

A synergistic two-step optimization design enables high capacitive energy storage in lead-free Sr0.7Bi0.2TiO3-based relaxor ferroelectric ceramics

“…From an application viewpoint, the charge-discharge performance is an important index for evaluating the potential of capacitor applications. 18,67 As shown in Fig. 4(h), according to underdamped and overdamped measurements (Fig.…”

High Energy Storage Performance and Large Electrocaloric Response in Bi0.5Na0.5TiO3–Ba(Zr0.2Ti0.8)O3 Thin Films

“…Among the various energy storage technologies, dielectric capacitors exhibit fast charge–discharge speed and high power density. Therefore, they play a vital role in many energy applications. ,,− The energy storage performance-related parameters of dielectric capacitors, such as the recoverable energy storage density ( W rec ) and efficiency ( η ), can be calculated using the following formulas: − W tot = prefix∫ 0 P max E d P W rec = prefix∫ P normalr P max E d P η = W rec W tot × 100 % where W tot is the total energy storage density and P r , P max , and E refer to the remanent polarization, maximum polarization, and applied field, respectively. Two decisive parameters should be considered to achieve outstanding energy storage performance.…”

Enhancement in the energy storage performance of P(VDF-HFP)-based composites by adding PLZST inorganic nanoparticles

“…21 Furthermore, an optimized BT/PVDF nanocomposite acquired an ultra-high U e value of 16.2 J cm −3 at 410 MV m −1 . 22 In addition, lead-based antiferroelectric ceramics show the characteristics of a remarkable dielectric constant, remarkable polarization, low hysteresis, and low loss, showing preeminent energy storage characteristics; 23,24 hence, they can also be used as nanofillers and compounded with polymers to obtain nanocomposites. For instance, PLZT/PVDF nanocomposites with a three-layer structure have favourable electrical properties.…”