摘要
Ceramics are reliable materials for energy storage and high-power pulse discharge capacitors. However, breakdown electric field (BDS), recoverable energy storage density (W-rec), discharge time (t(0.9)) become the main constraints. As regards, compositional engineering was adopted to induce relaxation behavior in (Na0.5Bi0.5)(0.94)Ba0.06TiO3 (NBT-BT) based ceramics by which energy storage performance (ESP) and charge discharge properties (CDP) were significantly improved. (Na0.5Bi0.5)(0.94)Ba-0.06(Ti1-xZrx)O-3 (NBBTZ, x = 0, 0.04, 0.08, 0.12, 0.16, 0.20) ceramics are compositional modulation by introducing Zr4+ at B-site. The relaxor ferroelectrics, ESP and CDP of NBBTZ ceramics were significantly improved with the injection of Zr4+. Excellent ESP such as W-rec with 2.83 J cm(-3), ultra-high normalized response (xi) with 134.76 J kV(-1) m(-2) and maximum polarization (P-max) of 39.96 mu C cm(-2) are obtained at 210 kV cm(-1). Excellent high-temperature CDP has been excavated simultaneously. Discharge energy density (W-dis), power density (P-D) and t(0.9) of 0.601 J cm(-3), 35.9 MW cm(-3) and 83.5 ns were obtained at 100 degrees C and 100 kV cm(-1), respectively. The above results show that NBBTZ ceramics have the ability to become reliable energy storage and pulse power capacitors.
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单位西安交通大学; i; 陕西科技大学; 桂林理工大学