Roll-to-Roll Manufactured Polyetherimide Nanocomposite With Different Diameters of SiO Nanoparticles Exhibiting Improved High-Temperature Dielectric Energy Storage Performance.

To enhance the high-temperature energy storage performance of the polymer-based dielectric film, inorganic nanofillers with large band gaps are much more effective and have been widely adopted. However, the impact of nanoparticle diameters on the dielectric properties of polymer nanocomposites has been less studied. Herein, silicon dioxide nanoparticles (SiO-NPs) with varying diameters (20, 60, 120, 200 nm) prepared by the sol-gel method are incorporated in the PEI matrix to form PEI/SiO nanocomposites.