材料科学
铁电性
极化(电化学)
陶瓷
储能
离子
电场
电阻率和电导率
电介质
复合材料
光电子学
电气工程
热力学
化学
物理
功率(物理)
有机化学
物理化学
量子力学
工程类
作者
Hui Guo,Fangfang Zeng,Wenrong Xiao,Shenglin Jiang,Yuxin Chen,Bowen Wang,Guifen Fan,Wenzhong Lu,Zhengkai Tu
标识
DOI:10.1016/j.jeurceramsoc.2023.04.024
摘要
BiFeO3-based lead-free ferroelectric is considered a potential candidate for energy storage applications owing to its high spontaneous polarization. To tackle the compromise between high polarization and energy storage density, NaNbO3 (NN) was introduced into 0.7BiFeO3-0.3Ba(Hf0.05Ti0.95)O3 (BF-BHfT) ceramics, where Nb5+ ions enter the BF-BHfT lattices and enhance resistivity, while Na+ ions occupied on the A-sites and smash the long-range ferroelectric order into polar nanoregions. Consequently, the ceramics could maintain high maximum polarization and low remanent polarization. High recoverable energy density (Wrec) of 5.2 J/cm3 and efficiency (88%) were recorded in 0.53BF-0.3BHfT-0.17NN ceramics. Besides, it exhibited good thermostability up to 120 °C (Wrec variation < 5%), frequency stability from 10 to 200 Hz (Wrec variation < 7%) and excellent fatigue resistance after 104 cycles (Wrec variation < 0.2%). Under different electric fields the efficiency still maintains nearly constant. In charge-discharge test a Wdis of 3.7 J/cm3 was recorded, which proved 0.53BF-0.3BHfT-0.17NN ceramics a promising candidate for energy storage applications.
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