Fluorinated Polyimide Nanocomposite Films Incorporated with Plate-like Bi4Ti3O12 Capable of High Breakdown Strength and Electrostatic Energy Density

Zexue Lin, Weijia Wang, Yao Su, Ning Yang, Zhuo Zhang, Zhiyong Liao, Peizhi Dong, Ruizhe Zhang, Dengwei Hu, Huiqing Fan

Research output: Contribution to journalArticlepeer-review

Abstract

Inorganic and organic nanocomposite dielectrics capable of high energy storage, fast charge-discharge speed, and high-temperature stability are in high demand for application in advanced electronic devices and electrical power systems. However, a major obstacle is the reasonable design of high-performance fillers that are conducive to the breakdown strength. In this work, inorganic-organic nanocomposite films prepared by blending two-dimensional (2D) plate-like Bi4Ti3O12 (BTO) with fluorinated polyimide (FPI) are reported. Benefiting from the 2D plate-like BTO, which acts as a physical barrier during the breakdown process, the resultant FPI nanocomposite films exhibit significantly improved breakdown strength over a wide temperature range. Especially, the 1 wt % BTO/FPI nanocomposite film achieves ultrahigh energy densities of 11.15 J cm-3 under 719.23 MV m-1 and 5.72 J cm-3 under 562.52 MV m-1 at room temperature and 150 °C, respectively. The performance at 150 °C outperforms most of the reported dielectric nanocomposites. This work offers a valuable insight for the development of dielectric fillers with a high aspect ratio, facilitating the progression of high-performance dielectric polymer nanocomposite films.

Original languageEnglish
JournalACS Applied Materials and Interfaces
DOIs
StateAccepted/In press - 2025

Keywords

  • BiTiO nanoplates
  • breakdown strength
  • energy density
  • fluorinated polyimide
  • inorganic−organic nanocomposite films

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