High-energy storage performance of (1 − x)[0.935(Bi0.5Na0.5)TiO3–0.065BaTiO3]–xBa(Zr0.3Ti0.7)O3 ceramics with wide temperature range

Abstract

The (1 − x)[0.935(Bi0.5Na0.5)TiO3–0.065BaTiO3]–xBa(Zr0.3Ti0.7)O3 (BNT–BT–xBZT) ceramics with high-energy storage properties were designed and characterized. All the BNT–BT–xBZT ceramics exhibit a pure perovskite structure. The grain size of ceramics becomes larger as the BZT content increases. Enhanced energy density performances (Wrec = 1.9 J/cm3, η = 86%) are achieved for the BNT–BT–0.4BZT ceramics at 210 kV/cm. Specifically, the energy stored in the material can be rapidly released within 0.27 µs. Excellent temperature stability with the variation of Wrec less than 7% is realized in a wide temperature range from 20 to 140 °C. Moreover, the energy storage performances have good reliability after 105 electric field cycles. The high-energy storage performances indicate that the BNT–BT–0.4BZT ceramics are promising candidates in pulsed-power applications.