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Enhanced high-temperature energy storage performances in polymer dielectrics by synergistically optimizing band-gap and polarization of dipolar glass

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Listed:
  • Minzheng Yang

    (Tsinghua University)

  • Weibin Ren

    (Tsinghua University)

  • Zenghui Jin

    (Tsinghua University)

  • Erxiang Xu

    (Tsinghua University)

  • Yang Shen

    (Tsinghua University)

Abstract

Polymer dielectrics play an irreplaceable role in electrostatic capacitors in modern electrical systems, and have been intensively studied with their polarization and breakdown strength (Eb) optimized for high discharged energy density (Ud) at elevated temperatures. Small molecules have been explored as fillers, yet they deteriorate thermal stability of matrix which limits their optimal loading to ~1 wt%. Herein, we develop a polymer blend dielectric consisting of common polyimide and a bifunctional dipolar glass polymer which are synthesized from two small molecule components with wide band-gap and large dipole moment. The bifunctional dipolar glass with large molecular weight not only maintains thermal stability of polymer blends even at a high loading of 10 wt%, but also induces substantial enhancement in polarization and Eb than any of individual components does, achieving an ultrahigh Ud of 8.34 J cm−3 (150 °C) and 6.21 J cm−3 (200 °C) with a charge-discharge efficiency of 90%.

Suggested Citation

  • Minzheng Yang & Weibin Ren & Zenghui Jin & Erxiang Xu & Yang Shen, 2024. "Enhanced high-temperature energy storage performances in polymer dielectrics by synergistically optimizing band-gap and polarization of dipolar glass," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
  • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-52791-8
    DOI: 10.1038/s41467-024-52791-8
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    4. Qi Li & Lei Chen & Matthew R. Gadinski & Shihai Zhang & Guangzu Zhang & Haoyu U. Li & Elissei Iagodkine & Aman Haque & Long-Qing Chen & Thomas N. Jackson & Qing Wang, 2015. "Flexible high-temperature dielectric materials from polymer nanocomposites," Nature, Nature, vol. 523(7562), pages 576-579, July.
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