High-entropy enhanced capacitive energy storage

Bingbing Yang; Yang Zhang; Hao Pan; Wenlong Si; Qinghua Zhang; Zhonghui Shen; Yong Yu; Shun Lan; Fanqi Meng; Yiqian Liu; Houbing Huang; Jiaqing He; Lin Gu; Shujun Zhang; Long-Qing Chen; Jing Zhu; Ce-Wen Nan; Yuan-Hua Lin

doi:10.1038/s41563-022-01274-6

High-entropy enhanced capacitive energy storage

Nat Mater. 2022 Sep;21(9):1074-1080. doi: 10.1038/s41563-022-01274-6. Epub 2022 Jun 6.

Authors

Bingbing Yang^#¹, Yang Zhang^#^{1

2

3

4}, Hao Pan^#^{1

5}, Wenlong Si^{1

2

3}, Qinghua Zhang⁶, Zhonghui Shen⁷, Yong Yu⁸, Shun Lan¹, Fanqi Meng^{1

6}, Yiqian Liu¹, Houbing Huang⁹, Jiaqing He⁸, Lin Gu^{1

6}, Shujun Zhang¹⁰, Long-Qing Chen¹¹, Jing Zhu^{12

13

14}, Ce-Wen Nan¹⁵, Yuan-Hua Lin¹⁶

Affiliations

¹ State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, China.
² National Center of Electron Microscopy in Beijing, School of Materials Science and Engineering, Tsinghua University, Beijing, China.
³ Ji Hua Laboratory, Foshan, China.
⁴ State Key Laboratory of Low Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing, China.
⁵ Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, Singapore.
⁶ Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, China.
⁷ State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Center of Smart Materials and Devices, Wuhan University of Technology, Wuhan, China.
⁸ Department of Physics, Southern University of Science and Technology, Shenzhen, China.
⁹ Advanced Research Institute of Multidisciplinary Science, Beijing Institute of Technology, Beijing, China.
¹⁰ Institute for Superconducting and Electronic Materials, Australian Institute of Innovative Materials, University of Wollongong, Wollongong, New South Wales, Australia.
¹¹ Department of Materials Science and Engineering, Materials Research Institute, The Pennsylvania State University, University Park, PA, USA.
¹² State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, China. jzhu@mail.tsinghua.edu.cn.
¹³ National Center of Electron Microscopy in Beijing, School of Materials Science and Engineering, Tsinghua University, Beijing, China. jzhu@mail.tsinghua.edu.cn.
¹⁴ Ji Hua Laboratory, Foshan, China. jzhu@mail.tsinghua.edu.cn.
¹⁵ State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, China. cwnan@tsinghua.edu.cn.
¹⁶ State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, China. linyh@tsinghua.edu.cn.

^# Contributed equally.

PMID: 35668148
DOI: 10.1038/s41563-022-01274-6

Abstract

Electrostatic dielectric capacitors are essential components in advanced electronic and electrical power systems due to their ultrafast charging/discharging speed and high power density. A major challenge, however, is how to improve their energy densities to effectuate the next-generation applications that demand miniaturization and integration. Here, we report a high-entropy stabilized Bi₂Ti₂O₇-based dielectric film that exhibits an energy density as high as 182 J cm^-3 with an efficiency of 78% at an electric field of 6.35 MV cm^-1. Our results reveal that regulating the atomic configurational entropy introduces favourable and stable microstructural features, including lattice distorted nano-crystalline grains and a disordered amorphous-like phase, which enhances the breakdown strength and reduces the polarization switching hysteresis, thus synergistically contributing to the energy storage performance. This high-entropy approach is expected to be widely applicable for the development of high-performance dielectrics.

Abstract

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