Thermally stable polyimide nanocomposite films from electrospun BaTiO3 fibers for high-density energy storage capacitors

摘要: Barium titanate (BaTiO3, BT) fibers were prepared via electrospinning with a sol–gel precursor, followed by calcination process. Polyimide (PI) nanocomposite films the electrospun BT fabricated using an in situ dispersion polymerization method. The morphology and crystal structure of analyzed through scanning electron microscopy X-ray diffraction. It was found that their diameter length greatly dependent on temperature. Compared to spherical nanoparticles, introduction one-dimensional into PI matrix gave rise improved thermal stability. Besides, dielectric behaviors PI/BT-fiber composite investigated over frequency range from 102 Hz 106 within temperature 20–150 °C. results demonstrated permittivity at 30 vol% up ∼27, corresponding loss is relatively low (∼0.015). exhibited slight dependence temperature, while it highly fibers. This work opens new path optimize properties thermosetting polymer high energy storage density.