The NaNbO₃ antiferroelectrics have been considered as a potential candidate for dielectric capacitors applications. However, the high-electric-field-unstable antiferroelectric phase resulted in low energy storage density and efficiency. Herein, good energy storage properties were realized in (1-x)NaNbO₃-xNaTaO₃ ceramics, by building a new phase boundary. As a result, a high recoverable energy density (W_rec) of 2.2 J/cm³ and efficiency (η) of 80.1% were achieved in 0.50NaNbO₃-0.50NaTaO₃ ceramic at 300 kV/cm. The excellent energy storage performance originates from an antiferroelectric-paraelectric phase boundary with simultaneously high polarization and low hysteresis, by tailoring the ratio of antiferroelectric and paraelectric phases. Moreover, the 0.50NaNbO₃-0.50NaTaO₃ ceramic also exhibited good temperature and frequency stability, together with excellent charge-discharge performance. The results pave a good way of designing new NaNbO₃-based antiferroelectrics with good energy storage performance.

NaNbO ₃反铁电体已被认为是电介质电容器应用的潜在候选者。然而，高电场不稳定的反铁电相导致低能量存储密度和效率。在此，通过建立新的相界，(1- x )NaNbO ₃ - x NaTaO ₃陶瓷实现了良好的储能性能。结果，在 0.50NaNbO ₃ -0.50NaTaO ₃中实现了 2.2 J/cm ^{3的高可恢复能量密度 (} W _rec ) 和80.1% 的效率 ( η )陶瓷在 300 kV/cm。通过调整反铁电相和顺电相的比例，优异的储能性能源于同时具有高极化和低滞后的反铁电-顺电相界。此外，0.50NaNbO ₃ -0.50NaTaO ₃陶瓷还表现出良好的温度和频率稳定性，以及优异的充放电性能。该结果为设计具有良好储能性能的新型 NaNbO ₃基反铁电体铺平了道路。