Excellent thermal stability with high energy storage density in ultra-wide range of temperatures is the extremely important property of capacitors for applications in cold polar regions, extreme altitudes and high temperature regions. Here, we report on designing and preparing the BaZr_0.15Ti_0.85O₃/BaZr_0.35Ti_0.65O₃ (BZT15/BZT35) multilayer thin film capacitors. Under a given total thickness, the energy storage performances of the multilayer films can be optimized by controlling the number of interfaces. For the capacitor with an optimum period number N = 6, the markedly enhanced breakdown strength and large dielectric constant are achieved, which leads to a giant energy storage density (W_re) of ~83.9 J/cm³ with the efficiency (η) of ~78.4% and a superior power density of 1.47 MW/cm³ at room temperature. Moreover, the N = 6 multilayer capacitor also exhibits ultra-stable W_re of 69.1 J/cm³ (efficiency: 84.9%) to 63.2 J/cm³ (efficiency: 66.9%) from − 100 °C to 200 °C and a good reliability in W_re and η even after 10⁶ cycles at 200 °C. The excellent performances demonstrate that the multilayer films are a promising material system to meet the wide requirements of future applications, ranging from portable electronics to hybrid electric vehicles and aerospace power electronics.

电容器在极宽的温度范围内具有出色的热稳定性和高的储能密度，是在极地寒冷地区，极端海拔和高温地区应用的电容器的极其重要的性能。在此，我们报告设计和制备BaZr _0.15 Ti _0.85 O ₃ / BaZr _0.35 Ti _0.65 O ₃（BZT15 / BZT35）多层薄膜电容器。在给定的总厚度下，可以通过控制界面的数量来优化多层膜的储能性能。对于具有最佳周期数N = 6的电容器，可以获得显着增强的击穿强度和较大的介电常数，这导致约83.9 J / cm ³的巨大储能密度（W _re）和效率（η）为约78.4％，在室温下具有1.47 MW / cm ³的出色功率密度。此外，N = 6多层电容器还表现出69.1 J / cm ³至63.2 J / cm ^3的超稳定W _re（效率：84.9％）（效率：66.9％）从− 100°C到200°C，即使在200°C下经过10 ⁶个循环后，W _re和η也具有良好的可靠性。优异的性能表明，多层膜是一种有前途的材料系统，可以满足从便携式电子设备到混合动力汽车和航空航天电力电子设备等未来应用的广泛需求。