Ultra-high energy storage density and enhanced dielectric properties in BNT-BT based thin film

被引:39
作者
Xie, Yanjiang [1 ]
Hao, Hua [1 ]
Xie, Juan [1 ]
Zhang, Shuo [1 ]
Cao, Minghe [1 ]
Yao, Zhonghua [1 ]
Liu, Hanxing [1 ,2 ]
机构
[1] Wuhan Univ Technol, Sch Mat Sci & Engn, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China
[2] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Int Sch Mat Sci & Engn, Wuhan 430070, Peoples R China
关键词
Energy storage; Thin film; BNT-BT; REDUCED LEAKAGE CURRENT; FERROELECTRIC PROPERTIES; PERFORMANCE; CAPACITORS;
D O I
10.1016/j.ceramint.2021.05.038
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
In this work, Mn modified 0.94Bi0.5Na0.5TiO3-0.06BaTiO3 thin films (abbreviation for BNT-BT-Mnx) are prepared on Pt/Ti/SiO2/Si substrate via sol-gel and spin-coating. The influences of Mn dopant on the microstructural characteristics, dielectric and energy storage performances are studied systematically. It is found that by incorporating the Mn into BNT-BT, the breakdown strength and maximum polarization are enhanced dramatically, leading to the giant energy storage density of 54 J/cm3, with high permittivity 355 at 1 kHz. Moreover, the dominant leakage conduction mechanisms of the thin films are studied by linear fitting method, revealing that the leakage current mechanism of BNT-BT-Mnx films transforms from space-charge-limited conduction (SCLC) to Schottky emission as the increasing of electric field. The excellent energy storage density as well as dielectric properties suggest that BNT-BT-Mn6 thin film might be an attractive lead-free material for energy storage devices.
引用
收藏
页码:23259 / 23266
页数:8
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