Ultrahigh Energy Storage Properties in (Sr0.7Bi0.2)TiO3-Bi(Mg0.5Zr0.5)O3 Lead-Free Ceramics and Potential for High-Temperature Capacitors

Materials

Shujun Zhang¹  Xi Kong¹  Zhenxiang Cheng¹  Letao Yang¹ 

[1] ISEM, Australian Institute of Innovative Materials, University of Wollongong, Wollongong NSW 2500, Australia;

关键词: dielectric capacitors;    lead-free;    high temperature;    energy storage;   

DOI  :  10.3390/ma13010180

来源: DOAJ

【 摘 要 】

Due to the enhanced demand for numerous electrical energy storage applications, including applications at elevated temperatures, dielectric capacitors with optimized energy storage properties have attracted extensive attention. In this study, a series of lead-free strontium bismuth titanate based relaxor ferroelectric ceramics have been successfully synthesized by high temperature solid-state reaction. The ultrahigh recoverable energy storage density of 4.2 J/cm³ under 380 kV/cm, with the high efficiency of 88%, was obtained in the sample with x = 0.06. Of particular importance is that this ceramic composition exhibits excellent energy storage performance over a wide work temperature up to 150 °C, with strong fatigue endurance and fast discharge speed. All these merits demonstrate the studied ceramic system is a potential candidate for high-temperature capacitors as energy storage devices.

【 授权许可】

Unknown