Improved energy storage density and efficiency in BaTiO3-BiFeO3- based relaxor-ferroelectric ceramics

High-Entropy Strategy for Improved Mechanical and Energy Storage Properties in BaTiO3–BiFeO3-Based Ceramics

“…Analytical software was employed for calculating the grain-size distributions of the prepared ceramics to ascertain if any change in terms of grain size is observed for SMZTN -x samples with different x concentrations. The as-prepared ceramics with x = 0.04–0.10 have an average grain size of 1.36–1.58 μm, which is less than the SMZTN - 0 grain size (see Figures and S1 and our prior result) . We can, therefore, conclude that the SMZTN compositions help to prevent grain growth.…”

“…The chemicals Bi 2 O 3 (AR 99%), Fe 2 O 3 (AR 99%), MgO (AR 98%), ZnO (AR 99%), BaCO 3 (AR 99%), SrCO 3 (AR 99%), Ta 2 O 5 (99.5%), Nb 2 O 5 (99.9%), MnCO 3 (99.95%), and TiO 2 (AR 99%) involved in synthesis were all procured from Aladdin. The details of the fabrication process of SMZTN- x powders and ceramic specimens can be found in our earlier work . The compressed pellets were sintered at 940–980 °C for 3 h.…”

Superior energy storage performance of BiFeO3–BaTiO3–CaHfO3 lead-free ceramics

“…Among the lead-free ceramics, BiFeO 3 (BF)based ceramics captured considerable attention because of their excellent energy storage performance. [15][16][17][18][19][20] Wang et al reported a superb W rec = 3.0 J cm −3 for a 0.57BiFeO 3 -0.33BaTiO 3 -0.10Bi(Mg 2/3 Ta 1/3 )O 3 relaxor ferroelectric ceramic. 19 In the 0.85(0.67BiFeO 3 -0.33BaTiO 3 )-0.15Sr(Nb 0.5 Al 0.5 )O 3 ceramic, Liu et al obtained a remarkable W rec = 3.95 J cm −3 at a h = 85.9%.…”

“…[15][16][17][18][19][20] Wang et al reported a superb W rec = 3.0 J cm −3 for a 0.57BiFeO 3 -0.33BaTiO 3 -0.10Bi(Mg 2/3 Ta 1/3 )O 3 relaxor ferroelectric ceramic. 19 In the 0.85(0.67BiFeO 3 -0.33BaTiO 3 )-0.15Sr(Nb 0.5 Al 0.5 )O 3 ceramic, Liu et al obtained a remarkable W rec = 3.95 J cm −3 at a h = 85.9%. 20 Furthermore, Wang et al explored a series of 0.75(Bi 1−x Nd x ) FeO 3 -0.25BaTiO 3 ceramics and MLCCs that exhibited an ultrahigh W rec = 6.74 J cm −3 at an electric eld of 540 kV cm −1 for the MLCC with the composition of x = 0.15, showing their practical signicance in high-power energy storage applications.…”

“…Fig.1Comparison of W rec and h in BF-based,[15][16][17][18][19][20][30][31][32][33][34][35][36][37][38][39][40] NBT-based,[41][42][43][44] and NN-based 6,7,45-47 lead-free ceramics.…”