Constructing novel binary Bi0.5Na0.5TiO3-based composite ceramics for excellent energy storage performances via defect engineering

被引：60
作者：
Shen, Yihao [1 ]
Wu, Lukang [1 ]
Zhao, Jinghao [1 ]
Liu, Jinjun [1 ]
Tang, Luomeng [1 ]
Chen, Xiqi [1 ]
Li, Huanhuan [1 ]
Su, Zhen [2 ]
Zhang, Yang [4 ]
Zhai, Jiwei [3 ]
Pan, Zhongbin [1 ]
机构：
[1] Ningbo Univ, Sch Mat Sci & Chem Engn, Ningbo 315211, Zhejiang, Peoples R China
[2] Jiaxing Univ, China Australia Inst Adv Mat & Mfg, Jiaxing 34001, Zhejiang, Peoples R China
[3] Tongji Univ, Sch Mat Sci & Engn, 4800 Caoan Rd, Shanghai 201804, Peoples R China
[4] Chaohu Univ, Sch Chem & Meterials Engn, Hefei 238000, Peoples R China
来源：
CHEMICAL ENGINEERING JOURNAL | 2022年 / 439卷
基金：
中国国家自然科学基金;
关键词：
Capacitors; Defect engineering; Energy density; Polarization; Breakdown strength; LEAD-FREE CERAMICS; HIGH-EFFICIENCY; BISMUTH TITANATE; DENSITY; CAPACITORS; STABILITY; RELAXATION; FIELD;
D O I：
10.1016/j.cej.2022.135762
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
With the rapid development of sustainable and renewable technologies, electrostatic capacitors are now becoming a promising energy storage device. However, simultaneous achievement of large polarization and breakdown electric field of the electrostatic capacitors are an important technical challenge for improving energy storage density. In this article, we propose a surrogate approach by A-site defect engineering in (Bi0.47Sm0.03Na0.5-x)(0.94)Ba0.06TiO3 (BSNBT-x) ceramics to form two-phase structured composites ceramics, which contains of perovskite structured of the Bi0.5Na0.5TiO3 (BNT) with large polarization and Aurivillius phases of BaBi4Ti4O15 (BBT) generation high breakdown electric field. The phase-field simulations further demonstrate the Aurivillius phases BBT could significantly enhance breakdown electric field and retain high polarization. Accordingly, excellent recoverable energy density (W-rec similar to 4.62 J/cm(3)) and discharged efficiency (eta similar to 79.1%) are achieved in (Bi0.47Sm0.03Na0.42)(0.94)Ba0.06TiO3 ceramics. Moreover, the corresponding ceramic also displays brilliant thermal endurance (20 degrees C to 220 degrees C), fatigue endurance (similar to 10(6) cycles), and frequency stability (1 Hz to 1000 Hz). These results could provide a general strategy to develop the energy-storage performances of ceramic capacitors for application in high-energy/power-density storage systems.
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页数：9
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