Ultrahigh capacitive energy density in ion-bombarded relaxor ferroelectric films

doi:10.1126/science.abb0631

GSTDTAP > 气候变化

DOI	10.1126/science.abb0631
	Ultrahigh capacitive energy density in ion-bombarded relaxor ferroelectric films
	Jieun Kim; Sahar Saremi; Megha Acharya; Gabriel Velarde; Eric Parsonnet; Patrick Donahue; Alexander Qualls; David Garcia; Lane W. Martin
	2020-07-03
发表期刊	Science
出版年	2020
英文摘要	Dielectric capacitors are vital components of electronics and power systems. The thin-film materials of which capacitors are composed are usually optimized by changing the material composition. However, Kim et al. found that postprocessing an already effective thin-film dielectric by high-energy ion bombardment further improved the material because of the introduction of specific types of defects that ultimately improved the energy storage performance. The results suggest that postprocessing may be important for developing the next generation of capacitors. Science , this issue p. [81][1] Dielectric capacitors can store and release electric energy at ultrafast rates and are extensively studied for applications in electronics and electric power systems. Among various candidates, thin films based on relaxor ferroelectrics, a special kind of ferroelectric with nanometer-sized domains, have attracted special attention because of their high energy densities and efficiencies. We show that high-energy ion bombardment improves the energy storage performance of relaxor ferroelectric thin films. Intrinsic point defects created by ion bombardment reduce leakage, delay low-field polarization saturation, enhance high-field polarizability, and improve breakdown strength. We demonstrate energy storage densities as high as ~133 joules per cubic centimeter with efficiencies exceeding 75%. Deterministic control of defects by means of postsynthesis processing methods such as ion bombardment can be used to overcome the trade-off between high polarizability and breakdown strength. [1]: /lookup/doi/10.1126/science.abb0631
领域	气候变化 ; 资源环境
URL	查看原文
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/281886
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Jieun Kim,Sahar Saremi,Megha Acharya,et al. Ultrahigh capacitive energy density in ion-bombarded relaxor ferroelectric films[J]. Science,2020.
APA	Jieun Kim.,Sahar Saremi.,Megha Acharya.,Gabriel Velarde.,Eric Parsonnet.,...&Lane W. Martin.(2020).Ultrahigh capacitive energy density in ion-bombarded relaxor ferroelectric films.Science.
MLA	Jieun Kim,et al."Ultrahigh capacitive energy density in ion-bombarded relaxor ferroelectric films".Science (2020).