Significantly tailored energy-storage performances in Bi_0.5Na_0.5TiO₃–SrTiO₃-based relaxor ferroelectric ceramics by introducing bismuth layer-structured relaxor BaBi₂Nb₂O₉ for capacitor application

Abstract

Dielectric capacitor materials with remarkable energy storage density, remarkable power density, and outstanding charging-discharging performance have always been the focus of researches. Lead-free Bi0.5Na0.5TiO3 -based (BNT) relaxors have been deemed...

Superior energy storage performance in (Bi0.5Na0.5)TiO3-based lead-free relaxor ferroelectrics for dielectric capacitor application via multiscale optimization design

“…2(i). 11,15,19,30,35,40,41,43,54–95 More strikingly, the combined high W rec and ultrahigh η in the BNT-BAT-0.4CT ceramics designed by the above multiscale optimization strategy are competitive with those of the state-of-the-art lead-free AFE ceramics ( W rec of 6.3 J cm −3 and η of 90%), 19 showing great prospects in the field of environment-friendly energy-storage capacitor applications.…”

Simultaneously enhanced energy density and discharge efficiency of (Na0.5Bi0.5)0.7Sr0.3TiO3-La1/3(Ta0.5Nb0.5)O3 lead-free energy storage ceramics via grain inhibition and dielectric peak flattening engineering

“…8(d). Compared with NN-based, 47,48 BNT-based, [49][50][51][52][53][54][55][56] BT-based [57][58][59] and BF-based 60,61 ceramics under analogously low electric fields, the BNST-0.025LTN ceramic exhibits an appreciable W rec accompanied by an ultrahigh η. Obviously, the present study tenders an effective strategy to obtain a simultaneous elevation of W rec and η at low electric fields, which is competitive in practical applications of dielectric materials.…”

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

“…The induced ferroelectric state from the incommensurate antiferroelectric state is relaxor ferroelectric (RFE) phase. As discussed in other RFE dielectrics, [ 48–69 ] the ferroelectric domain of the RFE phase is unstable. In the process of depolarization, it changes rapidly from the ferroelectric macrodomains to the relaxor ferroelectric microdomains, generally resulting in the very small residual polarization.…”

“…Also, in the actual charging–discharging operation, the giant discharge energy density of W dis appears to be ≈15.4 J cm −3 under the utmost DC electric field of 780 kV cm −1 , which almost matches the P – E measurements (Figure S5, Supporting Information). So far, in terms of the as‐obtained energy storage properties, the as‐designed incommensurate antiferroelectric lead‐based ceramics are much more than those reported, as compared with other kinds of ceramics, as shown in Figure 4d [ 6–8,14,15,18–20,41–74 ] and Figure 4e. [ 8,14,15,20,42,48,50–57,59,61,65,67–69,71 ] Under the condition of equivalent thickness, the optimal performance reported here exceeds all existing antiferroelectric multilayer ceramic capacitors (MLCCs).…”

“…So far, in terms of the as‐obtained energy storage properties, the as‐designed incommensurate antiferroelectric lead‐based ceramics are much more than those reported, as compared with other kinds of ceramics, as shown in Figure 4d [ 6–8,14,15,18–20,41–74 ] and Figure 4e. [ 8,14,15,20,42,48,50–57,59,61,65,67–69,71 ] Under the condition of equivalent thickness, the optimal performance reported here exceeds all existing antiferroelectric multilayer ceramic capacitors (MLCCs). Ceramic thinning can fully excavate the properties, which is conducive to the reasonable and effective screening of high‐performance ceramic materials for MLCC.…”