Simultaneously achieving high energy storage density and efficiency under low electric field in BiFeO3-based lead-free relaxor ferroelectric ceramics

Pb/Bi-free Tungsten Bronze-Based Relaxor Ferroelectric Ceramics with Remarkable Energy Storage Performance

“…Consequently, an outstanding energy storage density value of 3.84 J/cm 3 with an excellent efficiency value of 93.2% is achieved simultaneously under an applied electric field of 410 kV/cm. A comparison of W rec and η values of the SKNT-0.8 ceramic and those reported in lead-based, ,,− Bi-based perovskite-based, ,,,− and Pb/Bi-free TB-based ,,, is shown in the Figure f. Apparently, the remarkable energy storage density and efficiency realized simultaneously in this study can be on a par with that of most Bi-based perovskite-based ceramics reported recently and are significantly superior than that of other TB-based ceramics, showing great advantages in potential high-power energy capacitor applications.…”

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.…”

High‐temperature dielectric and energy storage properties of Bi0.5Na0.5TiO3‐based ceramics modified by Sr0.8Na0.4Nb2O6

“…Therefore, developing new dielectric materials with wide temperature range of dielectric and energy storage properties are equally important. Many dielectric materials based on BaTiO 3 , BiFeO 3 , (K 0.5 Na 0.5 )NbO 3 , AgNbO 3 and Bi 0.5 Na 0.5 TiO 3 (BNT) have been extensively investigated 3,4,5,6,7,8,9,10,11 7,12,13 .…”