超晶格
铁电性
材料科学
电介质
反铁电性
电容器
储能
光电子学
极化(电化学)
凝聚态物理
工程物理
纳米技术
功率(物理)
电气工程
电压
物理
化学
工程类
量子力学
物理化学
作者
Hugo Aramberri,Natalya S. Fedorova,Jorgé Íñiguez
出处
期刊:Science Advances
[American Association for the Advancement of Science (AAAS)]
日期:2022-08-05
卷期号:8 (31)
被引量:7
标识
DOI:10.1126/sciadv.abn4880
摘要
The polarization response of antiferroelectrics to electric fields is such that the materials can store large energy densities, which makes them promising candidates for energy storage applications in pulsed-power technologies. However, relatively few materials of this kind are known. Here, we consider ferroelectric/paraelectric superlattices as artificial electrostatically engineered antiferroelectrics. Specifically, using high-throughput second-principles calculations, we engineer PbTiO3/SrTiO3 superlattices to optimize their energy storage performance at room temperature (to maximize density and release efficiency) with respect to different design variables (layer thicknesses, epitaxial conditions, and stiffness of the dielectric layer). We obtain results competitive with the state-of-the-art antiferroelectric capacitors and reveal the mechanisms responsible for the optimal properties.
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