Ma Chun-Hao, Liao Yi-Kai, Zheng Yunzhe, Zhuang Shihao, Lu Si-Cheng, Shao Pao-Wen, Chen Jia-Wei, Lai Yu-Hong, Yu Pu, Hu Jia-Mian, Huang Rong, Chu Ying-Hao
Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan.
Key Laboratory of Polar Materials and Devices, Department of Optoelectronics, East China Normal University, Shanghai 200241, People's Republic of China.
ACS Appl Mater Interfaces. 2022 May 18;14(19):22278-22286. doi: 10.1021/acsami.2c02281. Epub 2022 May 6.
Relaxor ferroelectric-based energy storage systems are promising candidates for advanced applications as a result of their fast speed and high energy storage density. In the research field of ferroelectrics and relaxor ferroelectrics, the concept of solid solution is widely adopted to modify the overall properties and acquire superior performance. However, the combination between antiferroelectric and paraelectric materials was less studied and discussed. In this study, paraelectric barium hafnate (BaHfO) and antiferroelectric lead hafnate (PbHfO) are selected to demonstrate such a combination. A paraelectric to relaxor ferroelectric, to ferroelectric, and to antiferroelectric transition is observed by varying the composition in the (BaPb)HfO solid solution from 0 to 100%. It is noteworthy that ferroelectric phases can be realized without primal ferroelectric material. This study creates an original solid solution system with a rich spectrum of competing phases and demonstrates an approach to design relaxor ferroelectrics for energy storage applications and beyond.
基于弛豫铁电体的储能系统因其快速响应和高储能密度，是先进应用的理想候选材料。在铁电体和弛豫铁电体的研究领域，固溶体概念被广泛用于改善整体性能并获得优异性能。然而，反铁电体和顺电体材料之间的组合研究和讨论较少。在本研究中，选择顺电体铪酸钡（BaHfO）和反铁电体铪酸铅（PbHfO）来展示这种组合。通过将（BaPb）HfO固溶体中的成分从0%变化到100%，观察到了从顺电体到弛豫铁电体、再到铁电体以及反铁电体的转变。值得注意的是，无需原始铁电材料就能实现铁电相。本研究创建了一个具有丰富竞争相谱的原创固溶体系统，并展示了一种为储能应用及其他领域设计弛豫铁电体的方法。
