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Polymer film capacitors, renowned for their exceptional efficiency in energy storage and conversion, find numerous applications within the realm of electrical engineering. In this investigation, commercial PI film was selected as the dielectric film, and aluminum nitride (AlN) and boron nitride (BN) were introduced as inorganic barrier layers on the surface of PI film by magnetron sputtering technology, respectively, to investigate the effect of inorganic layer on the energy storage performance of polymer films under high temperature. The results demonstrate that the high temperature energy storage capability of BN-PI-BN (B-P-B) composite film is superior to that of AlN-PI-AlN (A-P-A) composite film when sputtering time is 60 min. At 150 ℃ and 200 MV/m, the energy storage density (Ue) of B-P-B composite film sputtered for 60 min can reach 2.16 J/cm3.

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Polyimide Films Coated by Insulating Layers for Capacitive Energy Storage

  • 会议论文

  • 发表日期：

    2025年

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  • Shiyuan Luo,
  • Chao Yin,
  • Xue Zhang,
  • Shuo Zhao,
  • Zhanyi Wang,
  • Qingguo Chi

摘要

Polymer film capacitors, renowned for their exceptional efficiency in energy storage and conversion, find numerous applications within the realm of electrical engineering. In this investigation, commercial PI film was selected as the dielectric film, and aluminum nitride (AlN) and boron nitride (BN) were introduced as inorganic barrier layers on the surface of PI film by magnetron sputtering technology, respectively, to investigate the effect of inorganic layer on the energy storage performance of polymer films under high temperature. The results demonstrate that the high temperature energy storage capability of BN-PI-BN (B-P-B) composite film is superior to that of AlN-PI-AlN (A-P-A) composite film when sputtering time is 60 min. At 150 ℃ and 200 MV/m, the energy storage density (Ue) of B-P-B composite film sputtered for 60 min can reach 2.16 J/cm3.