High energy storage density and efficiency with excellent temperature and frequency stabilities under low operating field achieved in Ag0.91Sm0.03NbO3-modified Na0.5Bi0.5TiO3-BaTiO3 ceramics

Abstract

Ag 0.91 Sm 0.03 NbO 3-modified Na 0.5 Bi 0.5 TiO 3-BaTiO 3 ceramics (0.94−x)Na 0.5 Bi 0.5 TiO 3-0.06BaTiO 3-x(Ag 0.91 Sm 0.03)NbO 3 (x = 0, 0.03, 0.06, and 0.09) were prepared by solid-state reaction method. The structural, dielectric, and energy storage properties of the ceramics were systematically studied. Our results indicate that all ceramics exhibit pure perovskite structure with dense microstructure. All the elements in the ceramic are homogeneously distributed. The sample with the doping level x = 0.09, possesses good temperature stability of the dielectric constant (Δε′/ε′ 150 °C ≤ ± 15%) and low dielectric loss (< 0.02) over a wide temperature of 84-318 °C. A large energy storage density value of W rec = 2.12 J/cm 3 , high efficiency of ƞ = 83% under a low electric field of 18 kV/mm, as well as excellent temperature/frequency stabilities were simultaneously achieved in the sample. This work provides a viable way to design high energy storage performance lead-free ceramics operating at low fields.

Outstanding Energy Storage Performance of Na0.5Bi0.5TiO3-BaTiO3-(Sr0.85Bi0.1)(Mg1/3Nb2/3)O3 Lead-Free Ceramics

“…The (200) peak is clearly split into (200)/(002) peaks, as indicated in Figure b. This result shows that rhombohedral and tetragonal phases coexist in the system …”

“…It is worth noting that the η value can continue to remain at 89% under 30 kV/mm. To show the excellent energy storage ability of current ceramics, Figure shows a comprehensive comparison of the energy storage parameters between our ceramic and other NBT-based energy storage ceramic materials reported over the past 3 years. ,,,− Clearly, the energy storage properties of the present ceramic are better than those of most of the other ceramics. Figure S4a–d shows that the ceramic also exhibits excellent frequency and temperature stabilities.…”

Superior energy storage performance and ultrafast discharge of NBBT-based ceramics via introducing linear dielectric additives and rare earth oxides

“…[5][6][7] However, AgNbO 3 is not favored by researchers due to the high raw material price and complicated sintering process. 8 Lead-containing materials are limited because they are harmful to the environment and human body. Meanwhile, RFE ceramics have made great progress.…”

Ultrahigh Energy-Storage Performances in Lead-free Na0.5Bi0.5TiO3-Based Relaxor Antiferroelectric Ceramics through a Synergistic Design Strategy

“…Among various dielectric energy-storage ceramics, antiferroelectric (AFE) ceramics, characterized by a double polarization versus electric field ( P – E ) loop, are favored for outstanding advantages in W rec because of their large P max and near-zero P r from the electric field-induced reversible AFE–ferroelectric (FE) phase transition . Nevertheless, most AFE ceramics contain lead element, which can cause great harm to the human body and environment. − Although AgNbO 3 (AN)-based ceramics are recently treated as a novel potential lead-free AFE materials, their larger polarization hysteresis, expensive prices, and special requirement of sintering atmosphere limit their wide practical applications . These issues are the main motivation that led us to develop the novel lead-free AFE ceramics with outstanding energy-storage performances.…”

“…13−15 Although AgNbO 3 (AN)based ceramics are recently treated as a novel potential leadfree AFE materials, 16 their larger polarization hysteresis, expensive prices, and special requirement of sintering atmosphere limit their wide practical applications. 17 These issues are the main motivation that led us to develop the novel lead-free AFE ceramics with outstanding energy-storage performances. Na 0.5 Bi 0.5 TiO 3 (NBT) is the typical FE at room temperature and exhibits the AFE-like feature at high temperature due to the structural evolution from rhombohedral (R3c) to tetragonal (P4bm) transition.…”