Hu Jiawen, Wang Peng, He Liqiang, Ge Guanglong, Liu Jinjun, Hu Tengfei, Xu Fangfang, Zeng Tao, Fu Zhengqian, Zhai Jiwei, Li Weiping, Pan Zhongbin
School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, China.
Functional Materials Research Laboratory, School of Materials Science Engineering, Tongji University, Shanghai, China.
Nat Commun. 2025 Jul 1;16(1):5535. doi: 10.1038/s41467-025-60685-6.
Antiferroelectric ceramics, driven by electric-field-induced antiferroelectric-ferroelectric phase transitions, hold exceptional potential for high capacitance density capacitors. However, conventional antiferroelectric ceramics are capable of releasing only 70-80% of the energy during the charging-discharging cycles, limiting their practical applications. Herein, we propose a novel approach using heterogeneous dipolar structures in PbHfO-based AFE ceramics to achieve remarkable energy density. By compositionally inducing structural order-disorder transitions, heterogeneous dipolar structures with complex interactions are created, within which dipoles can rapidly flip under the applied electric field, thereby substantially reducing the hysteresis losses. Combined with significantly improved breakdown strength, the optimized antiferroelectric ceramics exhibits a large recoverable energy density approximately 20.04 J cm and a high efficiency of around 90.5%, setting a new benchmark for antiferroelectric ceramics. This work, focusing on the atomic scale, clarifies the structure-property relationship and provides valuable insights for developing next-generation high-performance antiferroelectric materials.
反铁电陶瓷在电场诱导的反铁电-铁电相变驱动下，在高电容密度电容器方面具有巨大潜力。然而，传统反铁电陶瓷在充放电循环中只能释放70%-80%的能量，限制了它们的实际应用。在此，我们提出一种在基于PbHfO的反铁电陶瓷中使用异质偶极结构的新方法，以实现显著的能量密度。通过成分诱导结构有序-无序转变，创建了具有复杂相互作用的异质偶极结构，其中偶极在施加电场下可以快速翻转，从而大幅降低滞后损耗。结合显著提高的击穿强度，优化后的反铁电陶瓷展现出约20.04 J/cm³的大 recoverable 能量密度和约90.5%的高效率，为反铁电陶瓷树立了新标杆。这项专注于原子尺度的工作阐明了结构-性能关系，并为开发下一代高性能反铁电材料提供了有价值的见解。
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