Sandwich structured lead-free ceramics based on Bi0.5Na0.5TiO3 for high energy storage

材料科学 储能 陶瓷 小型化 电容器 极化(电化学) 计算机数据存储 复合材料 工程物理 电气工程 纳米技术 电压 计算机科学 工程类 量子力学 操作系统 物理 物理化学 功率(物理) 化学
作者
Fei Yan,Hairui Bai,Yunjing Shi,Guanglong Ge,Xiaofeng Zhou,Jinfeng Lin,Bo Shen
出处
期刊:Chemical Engineering Journal [Elsevier]
卷期号:425: 130669-130669 被引量:42
标识
DOI:10.1016/j.cej.2021.130669
摘要

With the rapid development of electronic information technology and the rising environmental concerns as well as the tendency of electronic devices towards miniaturization and integration, enhancing the energy storage properties of lead-free ceramic capacitors is one of the imperative issues. Although a large number of efforts have been contributed to optimize the energy storage properties of lead-free ceramics, the conflict between the polarization and electric breakdown strength seriously impedes the improvement of energy storage density significantly. Herein, inspired by the layered composites of sandwich, the sandwich structured lead-free ceramics based on Bi0.5Na0.5TiO3 were designed and fabricated to overcome the above challenge effectively. The theoretical simulations and experiment results demonstrate that the polarization and electric breakdown strength can be optimized synchronously via the sandwich structured design. An ultrahigh recoverable energy storage density of ~ 6 J cm−3 and a nearly ideal energy conversion efficiency of ~ 95% can be obtained for the prepared sandwich structured lead-free ceramics. Meanwhile, the maximum applied electric field can be enhanced to more than 500 kV cm−1. The energy storage capabilities also exhibit outstanding stability over a broad temperature range, frequency range and cycle numbers. These results reveal that the Bi0.5Na0.5TiO3-based lead-free ceramics of this study have a great potential for high energy storage capacitors applications.
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