Na_0.5Bi_0.5TiO₃ (NBT)-based ceramics have been widely used as dielectric materials for energy storage capacitors because of their environmental friendliness and excellent ferroelectric properties. However, their energy storage performance still needs to be further improved to satisfy the increasing demand. Herein, we report a novel 0.90(Na_0.5Bi_0.5)_0.7Sr_0.3TiO₃-0.10Bi(Ni_0.5Sn_0.5)O₃ (0.90NBST-0.10BNS) ceramic with significantly improved energy density (5.0 J cm⁻³), enhanced recoverable energy density (4.18 J cm⁻³) and high energy efficiency (83.64%) through the incorporation of Bi(Ni_0.5Sn_0.5)O₃ (BNS), due to the increased breakdown strength and the relaxation ferroelectric (RFE) properties. The first-order reversal curve (FORC) measurements confirm that the addition of BNS improves RFE properties by breaking the order of long-range ferroelectricity. The 0.90NBST-0.10BNS ceramic also possesses an outstanding temperature and frequency stability of energy storage properties in the range of 20 °C–140 °C and 1 Hz–100 Hz, respectively. More importantly, the discharge properties characterized by a preeminent power density (36.19 MW cm⁻³), transient energy release times (144.2 ns), and high discharge energy density (1.16 J cm⁻³) also synchronously observed in 0.90NBST-0.10BNS ceramic. These results show that the 0.90NBST-0.10BNS ceramic with outstanding comprehensive performances is a promising energy storage ceramic candidate for capacitors in high power systems.

基于Na _0.5 Bi _0.5 TiO ₃（NBT）的陶瓷因其对环境友好和出色的铁电性能而被广泛用作储能电容器的介电材料。但是，它们的储能性能仍然需要进一步提高以满足不断增长的需求。在此，我们报告了一种新型的0.90（Na _0.5 Bi _0.5）_0.7 Sr _0.3 TiO ₃ -0.10Bi（Ni _0.5 Sn _0.5）O ₃（0.90NBST-0.10BNS）陶瓷，其能量密度（5.0 J cm ^-3）显着提高，增强的可回收能量密度（4.18 J cm ^-3）并通过添加Bi（Ni _0.5 Sn _0.5）O ₃（BNS）来提高能量效率（83.64％），这归因于击穿强度的提高和铁电弛豫（RFE）性能的提高。一阶反转曲线（FORC）测量结果证实，添加BNS可通过破坏远程铁电的阶数来改善RFE特性。0.90NBST-0.10BNS陶瓷还具有出色的温度和频率稳定性，能量存储特性分别在20°C–140°C和1 Hz–100 Hz的范围内。更重要的是，放电特性的特征在于卓越的功率密度（36.19 MW cm ^-3），瞬态能量释放时​​间（144.2 ns）和高放电能量密度（1.16 J cm ^-3））也同步在0.90NBST-0.10BNS陶瓷中观察到。这些结果表明，具有出色综合性能的0.90NBST-0.10BNS陶瓷是用于大功率系统电容器的有前途的储能陶瓷候选材料。