材料科学
储能
陶瓷
电介质
铁电性
放松(心理学)
极化(电化学)
热稳定性
电场
复合材料
光电子学
功率(物理)
热力学
化学工程
物理化学
工程类
物理
化学
社会心理学
量子力学
心理学
作者
Peng-Zu Ge,Zhigang Liu,Xian-Xiong Huang,Xin‐Gui Tang,Zhenhua Tang,Shuifeng Li,Qiu-Xiang Liu,Yanping Jiang,Xiaobin Guo
标识
DOI:10.1016/j.jmat.2023.02.014
摘要
BaTiO3(BT) has attracted extensive attention among advanced lead-free ferroelectric materials due to its unique dielectric and ferroelectric properties. However, the enormous remanent polarization and coercive field severely impede the improvement of its energy storage capabilities. Here, the BaTiO3Bi(Zn0.5Hf0.5)O3 (BT-BZH) ceramics with high breakdown field strength and remarkable relaxation characteristics can be obtained by introducing the composite component BZH in BT to regulate the phase structure and grain size of the ceramics. The findings demonstrate that the improvement of energy storage performance is related to the increase of relaxation behavior. A large energy storage density (Wrec∼3.62 J/cm3) along with superior energy storage efficiency (η∼88.5%) is achieved in 0.88BT-0.12BZH relaxor ceramics only at 240 kV/cm. In addition, the sample suggests superior thermal stability and frequency stability within 25–115 °C and 1–500 Hz, respectively. Furthermore, the outstanding charge-discharge properties with an ultrafast discharge time (100 ns), large discharged energy density (1.2 J/cm3), impressive current density (519.4 A/cm2) and power density (31.1 MW/cm3) under the electric field of 120 kV/cm are achieved in studied ceramics. The excellent energy storage performance of BT-BZH ceramics provides a promising platform for the application of lead-free energy-storage materials.
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