Dielectric ceramics with excellent energy storage properties were obtained by doping 0.92NaNbO3-0.08Bi(Ni0.5Zr0.5)O3 ceramics

Abstract

With the rapid development of the electronic component industry, studies are focusing on achieving a higher energy storage density in smaller volumes. In this study, 0.8 (0.92NaNbO3-0.08Bi(Ni0.5Zr0.5)O3)-0.2(Bi0.5Na0.5)0.7Sr0.3TiO3(0.2BNST) energy storage ceramics with a high maximum breakdown field strength (Eb) and excellent recoverable energy storage density (Urec) are prepared using a solid-state sintering method. A low grain size is obtained in synergy by incorporating sintering aids and linear materials to achieve a breakdown field strength of 655 kV/cm while obtaining Urec = 8.6 J/cm3 and η = 83.5%. In addition, the 0.2BNST ceramic exhibit good dielectric stability in the frequency range of 1–100 Hz at temperatures up to 100 °C. The 0.2BNST ceramic achieve high power density (PD = 107.7 MW/cm3), high current density (CD = 1196.7 A/cm2), and relatively fast discharge rate (t0.9 = 45 ns). These results indicate that 0.2BNST ceramics can potentially become high-performance energy storage capacitors.