Ultrahigh energy storage in superparaelectric relaxor ferroelectrics

Hao Pan, Shun Lan, Shiqi Xu, Qinghua Zhang, Hongbao Yao, Yiqian Liu, Fanqi Meng, Er Jia Guo, Lin Gu, Di Yi, Xiao Renshaw Wang, Houbing Huang, Judith L. MacManus-Driscoll, Long Qing Chen, Kui Juan Jin, Ce Wen Nan, Yuan Hua Lin

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Electrostatic energy storage technology based on dielectrics is fundamental to advanced electronics and high-power electrical systems. Recently, relaxor ferroelectrics characterized by nanodomains have shown great promise as dielectrics with high energy density and high efficiency. We demonstrate substantial enhancements of energy storage properties in relaxor ferroelectric films with a superparaelectric design. The nanodomains are scaled down to polar clusters of several unit cells so that polarization switching hysteresis is nearly eliminated while relatively high polarization is maintained. We achieve an ultrahigh energy density of 152 joules per cubic centimeter with markedly improved efficiency (>90% at an electric field of 3.5 megavolts per centimeter) in superparaelectric samarium-doped bismuth ferrite- barium titanate films. This superparaelectric strategy is generally applicable to optimize dielectric and other related functionalities of relaxor ferroelectrics.

Original languageEnglish (US)
Pages (from-to)100-104
Number of pages5
JournalScience
Volume374
Issue number6563
DOIs
StatePublished - Oct 1 2021

All Science Journal Classification (ASJC) codes

  • General

Cite this