Optimize energy storage performance of NaNbO3 ceramics by multivariable control strategy.

NaNbO 3 ceramics have broad application prospects in ultra-high power electronic systems, electromagnetic pulses, and other applications. In this study, (1- y)[(1- x)NaNbO 3 - x SmMg 0.5 Zr 0.5 O 3 ]- y (Bi 0.5 Na 0.5) 0.7 Sr 0.3 TiO 3 (x = 0.06, 0.08 and 0.10)(y = 0.30, 0.35, 0.40 and 0.45) ceramics were fabricated. The effects of the incorporation of SmMg 0.5 Zr 0.5 O 3 (SMZ) and (Bi 0.5 Na 0.5) 0.7 Sr 0.3 TiO 3 (BNST) on the energy storage performance, impedance, actual charge and discharge capacity, phase structure and microstructure of the ceramic samples were analyzed. Finally, when x = 0.08, and y = 0.35, the recoverable energy storage density of the sample was 5.8 J/cm3 and a high energy storage efficiency of 88 % was obtained at 545 kV/cm. In addition, the ceramic maintains a stable actual charge and discharge capacity and an extremely fast discharge time (16.1 ns) in a wide temperature range (20–160 °C). These excellent energy-storage performances may be due to the fine grain size and large relaxation and activation energies. [Display omitted] [ABSTRACT FROM AUTHOR]