Abstract
Antiferroelectric materials form a potential candidate for ceramic-based high energy storage applications owing to their low loss and high energy density. Here, we demonstrate that the antiferroelectric phase with high energy-storage properties in 0.94Bi0.5+xNa0.5−xTiO3–0.06BaTiO3 (BNTx–BT) ceramics at room-temperature is modulated by tailoring compositions. Our results show that the metastable antiferroelectric phase at room-temperature modulated by the Bi/Na ratio with a high excess in Bi3+ and/or a deficiency in Na+, can be induced to the FE phase by applying electrical field, leading to double hysteresis. The high energy storage density W = 1.76 J/cm3 for x = 0.05 BNTx–BT ceramics by modulating Bi/Na ratio is obtained, suggesting a promising candidate lead-free energy-storage material.
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