Improved energy storage in antiferroelectric AgNbO3-modulated 0.925Bi0.5Na0.5TiO3 – 0.075BaTiO3 relaxor ferroelectric ceramics

Achieving Remarkable Energy Storage Performances under Low Electric Field in Bi0.5N0.5TiO3-SrTiO3-Based Relaxor Ferroelectric Ceramics via a Heterostructure Doping Strategy

“…However, the BNT-ST-0.04SNN ceramic may ensure a considerable W rec (5.22 J/cm 3 ) while having a superior η (93.87%) in this study. Moreover, it should be noted that the W rec / E values of our works are superior to most of the reported ceramics, as shown in Figure f and Table , implying that the obtained BNT-ST-SNN ceramics possess great potential for capacitor applications requiring high energy storage under low electric fields. ,,,− The good polarization behavior is directly responsible for this. Collectively, all of these results show that the ceramic system BNT-ST-0.04SNN is a desirable option for energy storage applications.…”

“…The strong coexistence of R3c and P4bm phases might contribute to the enhancement of relaxor behavior and induce optimized dielectric and energy storage properties. 12,24 To further reveal the local structure variation of BNT-ST with different SNN heterostructure doping concentrations, Raman spectra characterization was performed. As shown in Figure 2e, clear vibration modes can be observed in the measured wavenumber region, indicating that the major crystalline phase is still the perovskite structure.…”

“…It should be noted that the BNT-ST-0.04SNN ceramic exhibits a higher T phase content compared with the pristine BNT-ST ceramic, which might be also ascribed to the diffusion of Na + and Nb 5+ of SNN into the BNT-ST matrix. The strong coexistence of R 3 c and P 4 bm phases might contribute to the enhancement of relaxor behavior and induce optimized dielectric and energy storage properties. , …”

“…In general, there are four types of dielectric materials: ferroelectrics, antiferroelectrics, linear dielectrics (LDs), and relaxor ferroelectrics (REFs). , Compared with the other, lead-free RFEs, ceramic materials have recently risen to a research priority of the energy storage industry due to a significant polarization disparity (Δ P ) and growing environmental concerns. , So far, a considerable amount of perovskite lead-free RFE energy storage materials have been developed, including Bi 0.5 Na 0.5 TiO 3 (BNT)-based, BaTiO 3 (BT)-based, K 0.5 Na 0.5 NbO 3 (KNN)-based, and BiFeO 3 (BF)-based ceramics. − Among the various materials, BNT-based RFEs, especially Bi 0.5 Na 0.5 TiO 3 - x SrTiO 3 (BNT-ST)-based RFEs, are the most extensively researched materials due to their high maximum polarization (∼50 μC/cm 2 ) at a low electric field . However, the non-negligible P r still needs further improvements in the ESPs of BNT-based ceramics. , …”

Enhanced energy storage performance in reaction-sintered AgNbO3 antiferroelectric ceramics

“…23 The three most common paths adopted in the literature to achieve mentioned goals are: (1) doping the A site with Yb, 24 Sm, 7,[25][26][27] Lu, 28 Gd, 25,29 Eu, 25 La, 30,31 Tb, 25 Dy, 25 Ho, 25 Er, 25 Tm, 25 Na, 23 Ca, 32 Mn, 20 Nd, 33,34 Bi, 35,36 Ba, 37 Sr, 38 Ce, 39 and the B site with Sb, 40 Hf, 41 Ta, 31,42 W, 20,43 Sc, 36 and Zr. 44,45 (2) Compositing with other dielectric materials such as 0.925Bi 0.5 Na 0.5 TiO 3 -0.075BaTiO 3 , 46 CaZrO 3 , 47 CaTiO 3 , 19 and PVDF. 48 (3) Modification of preparation and processing routes.…”