Relaxor antiferroelectric ceramics with ultrahigh efficiency for energy storage applications

Superior Energy‐Storage Capacitors with Simultaneously Giant Energy Density and Efficiency Using Nanodomain Engineered BiFeO3‐BaTiO3‐NaNbO3 Lead‐Free Bulk Ferroelectrics

“…This is also the reason why the x = 0.1 sample was chosen for further study. Although the W rec value of the x = 0.1 ceramic under 7 kV mm −1 is still inferior to that of other reported ceramic dielectrics (see Figure g), larger potentials can be expected if the applied electric field can be further increased.…”

“…W rec values in relaxor FEs and purely linear nonpolar dielectrics are usually restricted by limited P max values under high fields owing to low E B value and low ε r value, respectively. AFE ceramics usually exhibit relatively good energy‐storage properties owing to high P max , particularly for relaxor AFEs showing even better energy‐storage performances . However, it is particularly worthy of note in current work that superior comprehensive properties through excellent balance between W rec (≈8.12 J cm −3 ) and η (>90%) values have been realized in BF‐based relaxor FEs with x = 0.1 owing to inherently high P s , high applied field, and fast polarization response, showing huge advantages for the application in pulsed power electronics.…”

“…Among various types of dielectrics, antiferroelectric (AFE) materials have exhibited obvious advantages so far, thus achieving a continuous rise of recently reported W rec values . However, the hysteresis of the electric field induced phase transition in AFEs during charging and discharging is inherently responsible for inadequate energy efficiency (η), even for most relaxor AFEs in which high energy density has to compromise seriously with the efficiency and even the thermal stability. Low η values mean more dissipated heat, thus easily causing the failure of the capacitor in service.…”

Effect of electric hysteresis on fatigue behavior in antiferroelectric bulk ceramics under bipolar loading

“…The peaks of the patterns are indexed with the pseudo-cubic unit cell. 17,18 The splitting of the (200) pseudo-cubic peaks in both compositions indicates a tetragonal distortion of the perovskite structure. 19 The peaks for PZ-S shift towards higher 2y angles, compared to PZ-L, suggesting smaller lattice parameters.…”

High energy storage density and efficiency with excellent temperature and frequency stabilities under low operating field achieved in Ag0.91Sm0.03NbO3-modified Na0.5Bi0.5TiO3-BaTiO3 ceramics

“…It is well-known that antiferroelectric (AFE) ceramics, owing to their double polarization hysteresis loops, possess high energy storage density [4,6,9,[13][14][15][16][17][18][19][20][21][22][23][24][25][26]. Unfortunately, a large number of energy storage AFE ceramics contain Pb element [17][18][19][20][21][22][23][24][25][26], which is harmful for people and environment. Besides, these ceramics usually exhibit large energy loss due to antiferroelectric-ferroelectric transition behavior [27,28].…”