Achieving high energy storage density and efficiency simultaneously in Sr(Nb0.5Al0.5)O3 modified BiFeO3 based lead-free ceramics

Delayed Polarization Saturation Induced Superior Energy Storage Capability of BiFeO3‐Based Ceramics Via Introduction of Non‐Isovalent Ions

“…The majority of BFO‐based ceramics (BFO contents ≥ 50%) have relatively low W rec (<5 J cm −3 ) and electric field (<400 kV cm −1 ). In particular, the BFO‐0.5(BST‐BZN) ceramic exhibits superb W rec (≈7.4 J cm −3 ) and high electric field (≈680 kV cm −1 ), which is significantly higher than that those of recently reported BFO‐based ceramics, for example, 0.56BFO‐0.30BaTiO 3 ‐0.14AgNbO 3 +5‰ mol CuO (2.11 J cm −3 , 195 kV cm −1 ), [ 29 ] 0.70(Bi 0.97 Nd 0.03 )[Fe 0.95 (Li 0.5 Nb 0.5 ) 0.05 ]O 3 ‐0.30BaTiO 3 + 0.1 wt% MnO 2 (3.2 J cm −3 , 290 kV cm −1 ), [ 30 ] 0.61BFO‐0.33BST‐0.06LMN + 0.1 wt% MnO 2 + 2 wt% BCB (3.38 J cm −3 , 230 kV cm −1 ), [ 31 ] 0.85(0.67BFO‐0.33BaTiO 3 )‐0.15Sr(Nb 0.5 Al 0.5 )O 3 (3.95 J cm −3 , 300 kV cm −1 ), [ 32 ] 0.87(0.63Bi 1.02 FeO 3 ‐0.37BaTiO 3 )‐0.13Bi(Zn 2/3 (Nb 0.85 Ta 0.15 ) 1/3 )O 3 (4.85 J cm −3 , 410 kV cm −1 ). [ 33 ] However, the BFO‐ x SrTiO 3 ceramics achieve an ultrahigh W rec of 8.4 J cm −3 and applied electric field of 750 kV cm −1 with x = 0.65, indicating that this system might be SrTiO 3 ‐based ceramics.…”

(Bi1/6Na1/6Ba1/6Sr1/6Ca1/6Pb1/6)TiO3-based high-entropy dielectric ceramics with ultrahigh recoverable energy density and high energy storage efficiency

“…8. 4,9–11,14–17,20,21,23,33–60 Obviously, to simultaneously achieve ultrahigh W rec (>8 J cm −3 ) and high η (>90%) is a great challenge for most ceramic capacitors because of the restrictive relationship between polarization and E b . 4 In addition, the further improvement of W rec is highly limited by E b .…”

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%.…”

“…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. 15 Calcium hafnate (CaHfO 3 , CH) is usually employed in insulating and optical applications because of its high breakdown strength, wide bandgap, and superior luminescence properties.…”

“…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.…”