Fatigue-Free Aurivillius Phase Ferroelectric Thin Films with Ultrahigh Energy Storage Performance
Fatigue-Free Aurivillius Phase Ferroelectric Thin Films with Ultrahigh Energy Storage Performance
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具有超高储能性能的无疲劳Aurivilius相铁电薄膜
DOI：
10.1002/aenm.202001536
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发表时间：
2020
影响因子：
27.8
通讯作者：
Wang Qing
中科院分区：
文献类型：
--
作者：
Pan Zhongbin;Wang Peng;Hou Xu;Yao Lingmin;Zhang Guangzu;Wang Jie;Liu Jinjun;Shen Meng;Zhang Yujing;Jiang Shenglin;Zhai Jiwei;Wang Qing
介质电容器已成为电子和电气系统的关键使能技术。虽然铁电陶瓷和电容器薄膜的发展取得了很大的进展，但在提高铁电体能量密度的同时，对防止极化疲劳的关注却少得多。本文报道了铁电Aurivillius相Bi3.25La0.75Ti3O12-BiFeO 3（BLT-BFO）在107次充电/放电循环和−60至200 °C的宽温度范围内具有上级电容性能和出色的稳定性，这是铁电材料记录的最佳电容性能之一。用BFO对BLT薄膜进行改性克服了铁电Aurivillius化合物的限制，并呈现出前所未有的理想特性组合，包括改善的极化、降低的铁电滞后和降低的高能量密度电容器的漏电流。鉴于这种Aurivillius相铁电体的无铅和无疲劳性质，这项工作揭示了一种用于电能存储应用的高性能环保铁电材料的新方法。
Dielectric capacitors have become a key enabling technology for electronics and electrical systems. Although great strides have been made in the development of ferroelectric ceramic and thin films for capacitors, much less attention has been given to preventing polarization fatigue, while improving the energy density, of ferroelectrics. Here superior capacitive properties and outstanding stability are reported over 107charge/discharge cycles and a wide temperature range of −60 to 200 °C of ferroelectric Aurivillius phase Bi3.25La0.75Ti3O12‐BiFeO3(BLT‐BFO), which represents one of the best capacitive performances recorded for the ferroelectric materials. The modification of BLT thin films with BFO overcomes the constraints of ferroelectric Aurivillius compounds and presents an unprecedented combination of the ideal features including improved polarization, reduced ferroelectric hysteresis, and lowered leakage current for high‐energy‐density capacitors. Given the lead‐free and fatigue‐free nature of this Aurivillius phase ferroelectric, this work unveils a new approach towards high‐performance eco‐friendly ferroelectric materials for electrical energy storage applications.