Enhancing Dielectric Energy Storage Properties of Poly(Arylene Ether Nitrile)

Strategic Insights -

Researchers from Northwest University have discovered a novel strategy to improve the distribution of boron nitride nanosheets in poly(arylene ether nitrile) for enhanced dielectric energy storage performances. By combining phase inversion and the hot-pressing method, the team created PEN-grafted BNNS (PEN@BNNS) and incorporated it into the PEN matrix, yielding hot-pressed PEN@BNNS/PEN (HPBP-x) composite films. The resulting material demonstrated simultaneously enhanced dielectric constant, breakdown strength, and discharge energy density, while maintaining excellent charge-discharge efficiency and stability.

Key Takeaways:

  • A novel strategy was proposed to enhance the distribution of boron nitride nanosheets in poly(arylene ether nitrile) for improved dielectric energy storage performances.
  • Phase inversion and hot-pressing were combined to create PEN-grafted BNNS (PEN@BNNS) and incorporate it into the PEN matrix.
  • The resulting hot-pressed PEN@BNNS/PEN (HPBP-x) composite films demonstrated enhanced dielectric constant, breakdown strength, and discharge energy density.
  • The material showed excellent charge-discharge efficiency and stability.
  • This research provides new insights for developing flexible dielectric energy storage materials.

Statistics:

  • The dielectric constant of the HPBP-9 material was enhanced to 4.87.
  • The breakdown strength of the HPBP-9 material was improved to 323.3 kV mm-1.
  • The discharge energy density of the HPBP-9 material was increased to 2.09 J cm-3.
  • The charge-discharge efficiency of the HPBP-9 material was over 95%.
  • The material showed excellent stability after 104 cycles.

Sources:

  • "Enhancing Dielectric Energy Storage Properties of Poly(Arylene Ether Nitrile) Via Controlling the Distribution of Boron Nitride Nanosheets." Advanced Functional Materials, 2025.
  • NewsRx. "Reports from Northwest University Add New Data to Findings in Nanosheets [Enhancing Dielectric Energy Storage Properties of Poly(Arylene Ether Nitrile) Via Controlling the Distribution of Boron Nitride Nanosheets]." Nanotechnology Weekly, November 3, 2025, p 3258.