Abstract
? 2022 Elsevier B.V.In recent years, with the rapid development of electronic components industry, higher requirements are put forward for energy storage density and efficiency of pulse power capacitors. In this work, the improved energy storage density and efficiency of (Bi0.5Na0.5)0.7Sr0.3TiO3 (BNST)-based ceramics have been obtained by introducing the Sr0.85Bi0.1ZrO3(SBZ). The addition of SBZ reduced phase transition temperature to about 50 oC, accompanied by relaxation enhancement. A high recoverable energy density (Wrec = 3.53 J/cm3) and energy efficiency (η = 87.15%) were synchronously achieved in 0.875BNST-0.125SBZ ceramic under 270 kV/cm. Moreover, excellent temperature stability (20–120 oC) and frequency stability (5–200 Hz) for energy storage have been achieved at 150 kV/cm. A power density (PD) of 7.32 MW/cm3 and the transitory discharge time (t0.9 = 0.86 μs) were achieved for 0.875BNST-0.125SBZ ceramics under 120 kV/cm. These characteristics indicate that 0.875BNST-0.125SBZ ceramic is expected to be applied in high-power equipment.
NSTL
Elsevier