Enhanced antiferroelectric-like relaxor ferroelectric characteristic boosting energy storage performance of (Bi0.5Na0.5)TiO3-based ceramics via defect engineering

Lead-free (Bi0.5Na0.5)TiO3 (BNT)-based relaxor ferroelectric (RFE) ceramics have attracted a lot of attention due to their high power density and rapid charge-discharge capabilities, as well potential application in pulse capacitors. However, because the desire for smaller electronic devices, energy storage performance (ESP) should be enhanced even further. We describe defect engineering strategy enhancing antiferroelectric-like RFE feature BNT-based by unequal substitution rare-earth La3+ this paper. The ESP La3+-doped samples is raised 25% with same synthetic procedure thickness, an increase critical electric field (E-field) saturated E-field during polarization response, which induced modification barrier between lattice torsion. More impressively, ultrahigh recoverable Wrec 8.58 J/cm3 efficiency ? 94.5% are simultaneously attained 3 at.% La3+-substituted 0.6(Bi0.5Na0.4K0.1)1-1.5xLaxTiO3-0.4[2/3SrTiO3-1/3Bi(Mg2/3Ni1/3)O3] good temperature stability (Wrec = 4.6 ± 0.2 higher ?90% from 30 °C 120 °C), frequency stability, fatigue resistance. significant achieved through not only proves effectiveness our strategy, but also presents novel dielectric material applications