Zhao Mingyuan, Wang Jing, Yuan Hao, Zheng Zehan, Zhao Lei
Key Laboratory of High-precision Computation and Application of Quantum Field Theory of Hebei Province, College Physics Science and Technology, Hebei University, Baoding071002, China.
State Key Laboratory of Mechanics and Control of Mechanical Structures, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing210016, China.
ACS Appl Mater Interfaces. 2022 Nov 2;14(43):48926-48935. doi: 10.1021/acsami.2c16021. Epub 2022 Oct 19.
AgNbO-based Pb-free antiferroelectric (AFE) ceramics have attracted increasing interest owing to their excellent potential in energy storage applications. Herein, a high recoverable energy storage density () of 7.62 J/cm is realized in La-doped AgNbO ceramics prepared via tape casting. The high is attributed to high breakdown strength of 380 kV/cm induced by dense microstructure as well as fine grain size and enhanced AFE stability stemming from M phase and reduced tolerance factor . The high exceeding 6 J/cm was maintained in a wide temperature range of 20-150 °C and exhibited frequency stability with less than 8% variation in a range of 1-200 Hz. The discharge energy density exhibited temperature stability at 30-110 °C with less than 9% variation. Our research provides a good method for producing AgNbO-based ceramics having high energy storage performances.
基于AgNbO的无铅反铁电（AFE）陶瓷因其在储能应用中的优异潜力而受到越来越多的关注。在此，通过流延成型制备的La掺杂AgNbO陶瓷实现了7.62 J/cm³的高可恢复储能密度（）。高储能密度归因于致密微观结构诱导的380 kV/cm的高击穿强度，以及由M相产生的细晶粒尺寸和增强的AFE稳定性以及降低的容差因子。在20 - 150°C的宽温度范围内保持了超过6 J/cm³的高储能密度，并且在1 - 200 Hz范围内表现出频率稳定性，变化小于8%。放电能量密度在30 - 110°C表现出温度稳定性，变化小于9%。我们的研究为制备具有高储能性能的AgNbO基陶瓷提供了一种良好的方法。
