Greatly enhanced discharge energy density and efficiency of novel relaxation ferroelectric BNT–BKT-based ceramics

Abstract

The 0.65(NBT-BKT)–0.35SBT ceramic possesses an ultra-high recoverable energy storage density (Wrec ∼ 4.06 J cm−3) and maintains a relatively high efficiency (η = ∼87.3%).

Achieving ultrahigh energy-storage capability in PbZrO3-based antiferroelectric capacitors based on optimization of property parameters

“…It can be seen that the peak values also exhibit a general enhancement with the increase of electric eld. According to the current curve, discharge energy density (W dis ) can be deduced using the following formula: 65…”

A novel relaxor (Bi,Na,Ba)(Ti,Zr)O3 lead‐free ceramic with high energy storage performance

“…36,[46][47][48][49][50][51][52][53][54] The optimized 0.55BNT-0.45BZT ceramic demonstrates a large W rec (=2.62 J/cm 3 ), ultrahigh ƞ (>92%), and excellent thermal stability (<±8%) in a broad temperature span of −30 to 180°C simultaneously, which is much more superior in comparison to those reported lead-free energy storage ceramics such as BaTiO 3 (BT), Bi 0.5 Na 0.5 TiO 3 (BNT), NaNbO 3 (NN), AgNbO 3 (AN) systems etc. 18,46,48,51,52,55 A recently developed 0.65(BNT-BKT)-0.35SBT complex ceramic exhibits an energy storage ability with high W rec of up to 4.06 J/cm 3 (ƞ = 87.3%), while relatively low thermal stability results in a small W rec (~1.71 J/cm 3 ) and ƞ (81.7%) at 160°C. 52 The satisfactory thermal stability for present (1x)BNT-xBZT ceramics could be due to the PNR-dominated relaxations that greatly reduce the extensive diffusion phase transition temperatures and decrease the polarization hysteresis but maintain the large polarization in a broad temperature range.…”

“…18,46,48,51,52,55 A recently developed 0.65(BNT-BKT)-0.35SBT complex ceramic exhibits an energy storage ability with high W rec of up to 4.06 J/cm 3 (ƞ = 87.3%), while relatively low thermal stability results in a small W rec (~1.71 J/cm 3 ) and ƞ (81.7%) at 160°C. 52 The satisfactory thermal stability for present (1x)BNT-xBZT ceramics could be due to the PNR-dominated relaxations that greatly reduce the extensive diffusion phase transition temperatures and decrease the polarization hysteresis but maintain the large polarization in a broad temperature range. It is particularly noted that under a weak electric field, for example, of below 200 kV/cm, seldom reported dielectric system could reach an energy storage ability with W > 2 J/ cm 3 , which suggests a low field but high energy storage advance.…”

“…To put the present (1‐ x )BNT‐ x BZT into a role in the lead‐free dielectric ceramics, the energy storage performances were compared with the currently well‐established systems, as summarized in Figure 7 36,46‐54 . The optimized 0.55BNT‐0.45BZT ceramic demonstrates a large W rec (=2.62 J/cm 3 ), ultrahigh ƞ (>92%), and excellent thermal stability (<±8%) in a broad temperature span of −30 to 180°C simultaneously, which is much more superior in comparison to those reported lead‐free energy storage ceramics such as BaTiO 3 (BT), Bi 0.5 Na 0.5 TiO 3 (BNT), NaNbO 3 (NN), AgNbO 3 (AN) systems etc 18,46,48,51,52,55 …”

“…A recently developed 0.65(BNT‐BKT)‐0.35SBT complex ceramic exhibits an energy storage ability with high W rec of up to 4.06 J/cm 3 ( ƞ = 87.3%), while relatively low thermal stability results in a small W rec (~1.71 J/cm 3 ) and ƞ (81.7%) at 160°C 52 . The satisfactory thermal stability for present (1‐ x )BNT‐ x BZT ceramics could be due to the PNR‐dominated relaxations that greatly reduce the extensive diffusion phase transition temperatures and decrease the polarization hysteresis but maintain the large polarization in a broad temperature range.…”