Looking for a needle in the haystack of CLL

(1-x)Ba0.55Sr0.45TiO3-xBi(Mg0.5Ti0.5)O-3 (x = 0, 0.08, 0.1, 0.12, 0.15, 0.2) ceramics were fabricated via a solid-state reaction route. The ultrahigh recoverable energy density (Wrec = 4.05 J cm(-3)), efficiency (eta = 78%), maximum polarization (Pmax = 51.40 mu C cm(-2)), and high dielectric breakdown strength (BDS = 230 kV cm -1) were achieved for the 0.9BST-0.1BMT ceramic. The fast discharge rate (t0.9-0.14 mu s), current density (C-D-637.02 A cm(-2)), high power density (PD-38.70 MW cm-3), good temperature stability (20-180 ?C), frequency stability (10-500 Hz), and fatigue endurance for cycling (105) of 0.9BST-0.1BMT ceramic make it suitable for the development of energy-storage devices. The relaxor behavior with a high Wrec (3.06 J cm(-3)) and eta (93%) at BDS (220 kV cm( -1)) was also achieved for the 0.8BST-0.2BMT ceramic. This study systematically investigates the correlation among the structural, dielectric, impedance, and energy storage properties of BMT-doped BST ceramics.