Tailoring antiferroelectricity with high energy-storage properties in Bi0.5Na0.5TiO3–BaTiO3 ceramics by modulating Bi/Na ratio
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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+x Na0.5−x TiO3–0.06BaTiO3 (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.
KeywordsBaTiO3 Bismuth Titanate Antiferroelectric Phase High Energy Storage Depolarization Temperature
Part of this work was financially supported by the National Nature Science Foundation of China (11564007, 61561015, and 61361007) and Guangxi Key Laboratory of Information Materials (1310001-Z) and the Natural Science Foundation of Guangxi (Grant Nos. 2012GXNSFGA60002 and 2015GXNSFAA139250).
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