Wang Zhentao, Li Da, Liu Wenyuan, He Liqiang, Xu Diming, Liu Jinnan, Ren Jiajia, Wang Xin, Liu Yang, He Guoqiang, Bao Jian, Fang Zhen, Yan Guiwei, Liang Xu, Zhou Tao, Zhao Weichen, Liu Wenfeng, Wang Dong, Zhou Di
Multifunctional Materials and Structures, Key Laboratory of the Ministry of Education & International Center for Dielectric Research, School of Electronic Science and Engineering, Xi'an Jiaotong University, Xi'an, China.
State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace Engineering, Xi'an Jiaotong University, Xi'an, China.
Nat Commun. 2025 Mar 25;16(1):2892. doi: 10.1038/s41467-025-58268-6.
Multilayer ceramic capacitors with ultra-high-power densities are widely used in electronic power systems. However, achieving a balance between high energy density and efficiency remains a substantial challenge that limits the practical application of advanced technologies. Here, guided by a phase-field simulation method, we propose a directional slush-like polar structure design with nanodomains embedded in polar orthorhombic matrix in NaNbO-based lead-free multilayer ceramic capacitors. This strategy can effectively reduce the hysteresis loss by lowering domain size and improve the breakdown electric field by grain refining, which leads to a high energy storage density of 14.1 J▪cm and an ultrahigh energy storage efficiency of 96.8% in multilayer ceramic capacitors. The proposed strategy can be utilized to design high-performance energy storage dielectrics and other related functionalities.
具有超高功率密度的多层陶瓷电容器广泛应用于电子电力系统。然而，在高能量密度和效率之间取得平衡仍然是一个重大挑战，限制了先进技术的实际应用。在此，在相场模拟方法的指导下，我们提出了一种在基于NaNbO的无铅多层陶瓷电容器中，具有嵌入极性正交晶系基质中的纳米域的定向雪泥状极性结构设计。该策略可以通过减小畴尺寸有效降低滞后损耗，并通过细化晶粒提高击穿电场，这使得多层陶瓷电容器具有14.1 J▪cm的高储能密度和96.8%的超高储能效率。所提出的策略可用于设计高性能储能电介质和其他相关功能。
