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Enhanced energy storage performance of nano-submicron structural dielectric films by suppressed ferroelectric phase aggregation

Author

Listed:
  • Kun Xing

    (Beijing University of Posts and Telecommunications
    Tsinghua University)

  • Yanan Hao

    (Beijing University of Posts and Telecommunications)

  • Xin-Jie Wang

    (Tsinghua University)

  • Lei Huang

    (Tsinghua University)

  • Yi Gao

    (Beijing University of Posts and Telecommunications)

  • Tong Liang

    (Beijing University of Posts and Telecommunications)

  • Yan Meng

    (Beijing University of Posts and Telecommunications)

  • Ke Bi

    (Beijing University of Posts and Telecommunications)

  • Shao-Long Zhong

    (Tsinghua University)

  • Zhi-Min Dang

    (Tsinghua University)

Abstract

Maintaining high charge/discharge efficiency while enhancing discharged energy density is crucial for energy storage dielectric films applied in electrostatic capacitors. Here, a nano-submicron structural film comprising ferroelectric material P(VDF-HFP) and linear dielectric material PMMA has been flexibly designed via the electrospinning process. Nano-submicron structure enables the film to maximize the ferroelectric material component and obtain improved dielectric performance without sacrificing breakdown strength and charge/discharge efficiency. As a result, the 40%-420 nm PMMA-P(VDF-HFP)@PMMA sample achieved an discharged energy density of 13.72 J/cm³ at a field of 740 kV/mm, with an impressive charge/discharge efficiency of 80%. This work presents a composite dielectric film that excels in breakdown strength, discharged energy density, and charge/discharge efficiency, offering a strategy for designing reliable, industrial-grade energy storage dielectrics.

Suggested Citation

  • Kun Xing & Yanan Hao & Xin-Jie Wang & Lei Huang & Yi Gao & Tong Liang & Yan Meng & Ke Bi & Shao-Long Zhong & Zhi-Min Dang, 2025. "Enhanced energy storage performance of nano-submicron structural dielectric films by suppressed ferroelectric phase aggregation," Nature Communications, Nature, vol. 16(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-57249-z
    DOI: 10.1038/s41467-025-57249-z
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    References listed on IDEAS

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    1. Minzheng Yang & Haoyang Li & Jian Wang & Wenxiong Shi & Qinghua Zhang & Hanzheng Xing & Weibin Ren & Binzhou Sun & Mengfan Guo & Erxiang Xu & Nannan Sun & Le Zhou & Yao Xiao & Mufeng Zhang & Zhong Li , 2024. "Roll-to-roll fabricated polymer composites filled with subnanosheets exhibiting high energy density and cyclic stability at 200 °C," Nature Energy, Nature, vol. 9(2), pages 143-153, February.
    2. Rui Wang & Yujie Zhu & Jing Fu & Mingcong Yang & Zhaoyu Ran & Junluo Li & Manxi Li & Jun Hu & Jinliang He & Qi Li, 2023. "Designing tailored combinations of structural units in polymer dielectrics for high-temperature capacitive energy storage," Nature Communications, Nature, vol. 14(1), pages 1-11, December.
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