Abstract Polymer dielectrics are preferred materials for high-energy-density capacitive energy storage. In particular, high-temperature that can withstand harsh conditions, e.g., ?150 °C, is of crucial importance advanced electronics and electrical power systems. Herein, dielectric polymer composites composed polyetherimide (PEI) matrix hafnium oxide (HfO2) nanoparticles presented. It found the...

This paper presents a hierarchically designed polymer nanocomposite approach in which nanofillers at ultralow volume loading generate large dielectric enhancement blends of high temperature polymers with tailored nanostructures. We blend poly(1,4-phenylenen ether sulfone) (PES) polymers, such as polyetherimide (PEI), that possess more coiled chain conformations to tailor nano-morphologies. Maki...