Although tremendous studies have been focused on dielectric ceramics to achieve excellent energy storage and charge-discharge performance, the dielectric ceramics with high comprehensive energy storage properties for pulsed power applications are still in shortage. The large hysteresis came from domain switching process, severely weaken the energy storage and charge-discharge properties. Here, a strategy through ergodic relaxors with high dynamic polar nanoregions (PNRs) featuring with fast discharge rate and high energy storage efficiency was proposed to achieve high energy storage properties and extremely fast discharge speed in ferroelectric ceramic. The ergodic relaxors of Sr_0.7Bi_0.2TiO₃ modified by Na_0.73Bi_0.09NbO₃ (SBT-NBN) ceramics were selected to verify the feasibility of the strategy. Encouragingly, large W_rec of 2.49 J/cm³ together with high η of 89.7% can be achieved simultaneously at 250 kV/cm with the composition of 0.96SBT-0.04NBN. The outstanding stability of energy storage characteristics for temperature (25–125 °C) and frequency (1–100 Hz) was also found in 0.96SBT-0.04NBN ceramics. Besides, 0.96SBT-0.04NBN ceramics also possessed an extremely fast discharge rate (~34 ns), remarkable power density P_D (57.3 MW/cm³) as well as high current density C_D (955.4 A/cm²) at 120 kV/cm. This work provided an original strategy for high energy storage efficiency and high power density ceramics in pulse power applications.

尽管大量研究集中在介电陶瓷以实现优异的储能和充放电性能，但用于脉冲电源应用的具有高综合储能性能的介电陶瓷仍然缺乏。大的滞后来自域切换过程，严重削弱了能量存储和充放电性能。在这里，提出了一种通过具有高动态极性纳米区（PNR）的遍历弛豫策略，具有放电速率快和储能效率高的特点，以在铁电陶瓷中实现高储能性能和极快的放电速度。Na _0.73 Bi _0.09修饰的Sr _0.7 Bi _0.2 TiO ₃的遍历弛豫选择 NbO ₃ (SBT-NBN) 陶瓷来验证该策略的可行性。令人鼓舞的是，大W¯¯ _REC 2.49的J /厘米³为89.7％的高η一起可同时在250千伏/厘米0.96SBT-0.04NBN的组合物来实现的。在 0.96SBT-0.04NBN 陶瓷中也发现了温度 (25–125 °C) 和频率 (1–100 Hz) 储能特性的出色稳定性。此外，0.96SBT-0.04NBN 陶瓷还具有极快的放电速率 (~34 ns)、卓越的功率密度 P _D (57.3 MW/cm ³ ) 以及高电流密度 C _D (955.4 A/cm ²) 在 120 kV/cm。这项工作为脉冲功率应用中的高能量存储效率和高功率密度陶瓷提供了原始策略。