Energy storage in epitaxial multilayered BiFeO3/Na0.5Bi0.5TiO3/ La0.7Sr0.3MnO3 thin films

被引：10
作者：
Liu, Miao [1 ,2 ]
Gong, Chengzhuan [1 ,2 ]
Wei, Renhuai [1 ]
Hu, Ling [1 ]
Dai, Jianming [1 ]
Zhu, Xuebin [1 ]
Sun, Yuping [1 ,3 ,4 ]
机构：
[1] Chinese Acad Sci, Inst Solid State Phys, HFIPS, Key Lab Mat Phys, Hefei 230031, Peoples R China
[2] Univ Sci & Technol China, Hefei 230026, Peoples R China
[3] Chinese Acad Sci, High Magnet Field Lab, HFIPS, Hefei 230031, Peoples R China
[4] Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2023年 / 967卷
基金：
中国国家自然科学基金;
关键词：
Dielectric energy storage; Multilayer films; Na0.5Bi0.5TiO3; Lead-free ferroelectric; POLARIZATION ENHANCEMENT; PERFORMANCE; DENSITY; CERAMICS;
D O I：
10.1016/j.jallcom.2023.171767
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Lead-free dielectric film capacitors with fast charge-discharge rates are ideal for pulsed power capacitors, but their energy storage density lags behind. Lead-free epitaxial multilayered BiFeO3 (BFO)/Na0.5Bi0.5TiO3 (NBT)/ La0.7Sr0.3MnO3 (LSMO) films were designed and fabricated by solution processing and the effects of bottom electrodes as well as BFO thickness on microstructures, electrical properties and energy storage performances were investigated. Compared with the NBT film on Pt/Ti/SiO2/Si substrate, the leakage current densities are significantly suppressed and polarizations are obviously improved for the multilayered BFO/NBT/LSMO films. The BFO/NBT/LSMO film with BFO thickness of about 60 nm exhibits a recoverable energy storage density of 37.0 J/cm3 under 2680 kV/cm and excellent performance stability. These results demonstrate that the epitaxial multilayered BFO/NBT/LSMO films are promising candidates for high-power energy storage applications.
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页数：7
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