Metadielectrics for high-temperature energy storage capacitors

Rui Lu, Jian Wang, Tingzhi Duan, Tian-Yi Hu, Guangliang Hu, Yupeng Liu, Weijie Fu, Qiuyang Han, Yiqin Lu, Lu Lu, Shao-Dong Cheng, Yanzhu Dai, Dengwei Hu, Zhonghui Shen (), Chun-Lin Jia, Chunrui Ma () and Ming Liu ()
Additional contact information
Rui Lu: Xi’an Jiaotong University
Jian Wang: Wuhan University of Technology
Tingzhi Duan: Xi’an Jiaotong University
Tian-Yi Hu: Xi’an Jiaotong University
Guangliang Hu: Xi’an Jiaotong University
Yupeng Liu: Xi’an Jiaotong University
Weijie Fu: Xi’an Jiaotong University
Qiuyang Han: Xi’an Jiaotong University
Yiqin Lu: Xi’an Jiaotong University
Lu Lu: Ji Hua Laboratory
Shao-Dong Cheng: Xi’an Jiaotong University
Yanzhu Dai: Xi’an Jiaotong University
Dengwei Hu: Baoji University of Arts and Sciences
Zhonghui Shen: Wuhan University of Technology
Chun-Lin Jia: Xi’an Jiaotong University
Chunrui Ma: Xi’an Jiaotong University
Ming Liu: Xi’an Jiaotong University

Nature Communications, 2024, vol. 15, issue 1, 1-8

Abstract: Abstract Dielectric capacitors are highly desired for electronic systems owing to their high-power density and ultrafast charge/discharge capability. However, the current dielectric capacitors suffer severely from the thermal instabilities, with sharp deterioration of energy storage performance at elevated temperatures. Here, guided by phase-field simulations, we conceived and fabricated the self-assembled metadielectric nanostructure with HfO2 as second-phase in BaHf0.17Ti0.83O3 relaxor ferroelectric matrix. The metadielectric structure can not only effectively increase breakdown strength, but also broaden the working temperature to 400 oC due to the enhanced relaxation behavior and substantially reduced conduction loss. The energy storage density of the metadielectric film capacitors can achieve to 85 joules per cubic centimeter with energy efficiency exceeding 81% in the temperature range from 25 °C to 400 °C. This work shows the fabrication of capacitors with potential applications in high-temperature electric power systems and provides a strategy for designing advanced electrostatic capacitors through a metadielectric strategy.

Date: 2024
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DOI: 10.1038/s41467-024-50832-w

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