A synergistic two-step optimization design enables high capacitive energy storage in lead-free Sr_0.7Bi_0.2TiO₃-based relaxor ferroelectric ceramics

Abstract

Dielectric ceramic capacitors are essential components in next-generation advanced pulse power systems owing to their ultrafast charging/discharging rate and high power density, nevertheless confronting the critical challenges regarding the collaborative...

Superb Energy Storage Capability for NaNbO3‐Based Ceramics Featuring Labyrinthine Submicro‐Domains with Clustered Lattice Distortions

“…Above 100 °C, the P max and P r increase with temperature, which should be caused by the thermally stimulated conduction loss that is reflected in the gradually increased dielectric loss with increasing the test temperature (Figure S3, Supporting Information). [7] As shown in Figure S16c (Supporting Information) [28,[70][71][72][73][74][75] and Figure 6e , [14,28,39,69,71,[75][76][77] the frequency-and temperature-stabilities of ES properties for the optimal NN-BNT-0.2CT ceramic can be comparable to those of recently reported lead-free ceramics.…”

“…As histogramed in Figure 7e, E b , P d , and t 0.9 of the NN‐BNT‐0.2CT ceramic in this study also precede most recently reported lead‐free ceramics. [ 14,63,66,74,75,78 ] Overall, the designed NN‐BNT‐0.2CT ceramic is promising for the application in pulse‐power systems.…”

Giant comprehensive capacitive energy storage in lead-free quasi-linear relaxor ferroelectrics via local heterogeneous polarization configuration

“…From the service life of energy storage materials viewpoint, the mechanical performance such as hardness is important on a microscopic scale. 18,22,58 For x = 0.5, non-plastic deformation S1 † for references and details).…”

Multi-objective collaborative design optimized highly efficient energy capacitive lead-free relaxor ferroelectrics

“…Consequently, the ESP of a dielectric material can be tailored by adjusting the phase structure to reach an optimized proportion, 20 especially an optimized R-T phase structure, which represents the balance between a high W rec and high h. Designing lead-free RFEs by tailoring the nanodomain or polar nanoregion (PNR) conguration, essentially originating from a large local random eld with intensied compositional disorder, 35 is reported to be an effective route toward enhancing the ESP. [19][20][21][22]25,26,36,37 In particular, intrinsic PNRs, including the sizes, volume fraction, and dynamic response to the external electric eld, can offer a driving force for regulating reversible domain switching, generating slim P-E loops and small P r with low hysteresis, 6,38 although accompanied by the reduction in polarization. Furthermore, it is recognized that E b is a key factor affecting W rec , and band gap (E g ) engineering and microstructure optimization can generally boost E b .…”