Ultra-thin multilayer films for enhanced energy storage performance

IF 16.8 1区 材料科学 Q1 CHEMISTRY, PHYSICAL
Xin Zhang , Liang Shu , Ziqi Yang , Lisha Liu , Fangyuan Zhu , Hongliang Wang , Yue-Yu-Shan Cheng , Yu Huang , Jing-Feng Li
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Abstract

The rapid progress in microelectronic devices has brought growing focus on fast charging-discharging capacitors utilizing dielectric energy storage films. However, the energy density of these dielectric films remains a critical limitation due to the inherent negative correlation between their maximum polarization (Pmax) and breakdown strength (Eb). This study demonstrates enhanced energy storage performance in multilayer films featuring an ultra-thin layer structure. The introduction of a greater number of heterogeneous interfaces improves Eb, while lattice distortion and phase transitions, facilitated by diffusion and strain at interfaces, contribute significantly to the enhancement of Pmax. Remarkably, an energy density of 65.8 J/cm3 with an efficiency of 72.3% was achieved in a 6.7 nm-per-layer BiFeO3/SrTiO3 multilayer configuration, surpassing the performance of most multilayer films composed of simple constituents. This ultra-thin multilayer structure, which simultaneously promoted Pmax and Eb, provides a promising avenue for the development of high-performance dielectric materials.

Abstract Image

提高储能性能的超薄多层薄膜
微电子器件的快速发展使人们越来越关注利用电介质储能薄膜的快速充放电电容器。然而,由于最大极化(Pmax)和击穿强度(Eb)之间固有的负相关关系,这些电介质薄膜的能量密度仍然是一个关键的限制因素。本研究展示了具有超薄层结构的多层薄膜的增强储能性能。更多异质界面的引入提高了 Eb,而界面处的扩散和应变促进了晶格畸变和相变,从而显著提高了 Pmax。值得注意的是,在每层 6.7 纳米的 BiFeO3/SrTiO3 多层结构中,能量密度达到 65.8 J/cm3,效率高达 72.3%,超过了大多数由简单成分组成的多层薄膜的性能。这种超薄多层结构同时提高了 Pmax 和 Eb,为开发高性能介电材料提供了一条前景广阔的途径。
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来源期刊
Nano Energy
Nano Energy CHEMISTRY, PHYSICAL-NANOSCIENCE & NANOTECHNOLOGY
CiteScore
30.30
自引率
7.40%
发文量
1207
审稿时长
23 days
期刊介绍: Nano Energy is a multidisciplinary, rapid-publication forum of original peer-reviewed contributions on the science and engineering of nanomaterials and nanodevices used in all forms of energy harvesting, conversion, storage, utilization and policy. Through its mixture of articles, reviews, communications, research news, and information on key developments, Nano Energy provides a comprehensive coverage of this exciting and dynamic field which joins nanoscience and nanotechnology with energy science. The journal is relevant to all those who are interested in nanomaterials solutions to the energy problem. Nano Energy publishes original experimental and theoretical research on all aspects of energy-related research which utilizes nanomaterials and nanotechnology. Manuscripts of four types are considered: review articles which inform readers of the latest research and advances in energy science; rapid communications which feature exciting research breakthroughs in the field; full-length articles which report comprehensive research developments; and news and opinions which comment on topical issues or express views on the developments in related fields.
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