Achieving high energy storage performance by LaMg0.5Ti0.5O3 modification of multiphase engineered Bi0.5Na0.5TiO3–based ceramics

Ultrahigh energy storage performance of a 0.75Bi0.47Na0.47Ba0.06TiO3-0.25CaTi0.8Sn0.2O3 ceramic under moderate electric fields

“…The excellent integrated energy storage performance achieved can be related to the low tan δ , ultra-small P r , large E b , and induced polyphase nanodomains in the superparaelectric state. In comparison with numerous other energy storage ceramics, consisting of BNT-based, BT-based, NN-based, and other-based ceramics, 18–20,37–55,59–65 we can clearly see that at high/low electric fields, the W rec and η values are less than 5.5 J cm −3 and 90%, respectively. Encouragingly, the 0.75BNBT-0.25CTS ceramic simultaneously produces high W rec (= 5.81 J cm −3 ), ultra-high η (= 90.5%) and moderate E b , showing a more comprehensive advantage over the lead-free dielectrics reported so far, as given in Fig.…”

“…Lin et al prepared (1 − x (0.94Bi 0.5 Na 0.5 TiO 3 -0.06BaTiO 3 )- x LaMg 0.5 Ti 0.5 O 3 ceramics by transforming the ferroelectric phase into an ergodic relaxation phase by adjusting the tetragonal (T, P 4 bm ) and rhombohedral (R, R 3 c ) phase contents to achieve high energy storage performance ( W rec = 3.72 J cm −3 , η = 82.3%) at 270 kV cm −1 . 18 Li et al introduced K 1/2 Bi 1/2 (Zn 1/3 Nb 2/3 )O 3 in BNBT and obtained large W rec = 5.1 J cm −3 and η = 80% at a medium electric field of 290 kV cm −1 by expanding the [AO 12 ] cage and enhancing relaxation. 19 Luo et al achieved a W rec of 4.2 J cm −3 at 280 kV cm −1 by introducing Ca 2+ and Hf 4+ ions in BNBT through enhanced breakdown field strength and refinement of grains, but the η was low at 66.7%.…”

“…The Bi 0.47 Na 0.47 Ba 0.06 TiO 3 ceramic exhibits abundant polymorphic phase boundaries between the R-phase and T-phase (MPB) over a wide temperature range. 12,18,19 Therefore, the Bi 0.47 Na 0.47 Ba 0.06 TiO 3 (BNBT) ceramic was employed as the matrix to study its energy storage performances. CaTiO 3 facilitates the formation of nanodomains and structural transformation from the R-phase to T-phase, which can regulate the R/T phase content to build polymorphic nanodomains.…”

Prominent energy storage density and efficiency of Na0.5Bi0.5TiO3‐based ceramics via multiscale amelioration strategy

“…12 Deng et al refined grain size through doping La(Mg 0.5 Ti 0.5 )O 3 into Bi 0.47 Na 0.47 Ba 0.06 TiO 3 and realized large W rec (3.72 J/cm 3 ) and η (82.3 %). 13 Wu et al regulated bandgap width through introducing SrHfO 3 into Bi 0.47 Na 0.47 Ba 0.06 TiO 3 ceramics and realized a high W rec (5.83 J/cm 3 ) and η (83.67 %). 14 Wang et al optimized the dielectric behavior through adding KTaO 3 to Bi 0.47 Na 0.47 Ba 0.06 TiO 3 and achieved high W rec (4.89 J/cm 3 ) and η (84 %).…”

“…Deng et al. refined grain size through doping La(Mg 0.5 Ti 0.5 )O 3 into Bi 0.47 Na 0.47 Ba 0.06 TiO 3 and realized large W rec (3.72 J/cm 3 ) and η (82.3 %) 13 . Wu et al.…”