| Summary: | To develop antiferroelectric based dielectric capacitors with superior energy storage capacity, antiferroelectric materials must possess simultaneously large recoverable energy density and high energy efficiency. With this motivation, in this work, we design and prepare Pb0.97La0.02(Zr0.50Sn0.43Ti0.07)O3 antiferroelectric ceramics with high Sn content considering that Sn element can narrow the electric hysteresis loops and thus improve the energy density and efficiency. The experiment results indicate that a large room-temperature recoverable energy density of 3.47 J/cm3 and a high energy efficiency of 78% are realized simultaneously in this kind of ceramic. Besides, in the wide temperature range of 20–120 °C, the recoverable energy density and the energy efficiency both show superior temperature stability. The large recoverable energy density and high energy efficiency in a wide temperature range demonstrate that the Pb0.97La0.02(Zr0.50Sn0.43Ti0.07)O3 antiferroelectric ceramic is a good candidate for preparing pulse power capacitors usable in various conditions. Keywords: Antiferroelectric, High Sn content, Energy storage, Recoverable energy density, Energy efficiency
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