We have been devoted to developing solid-state nanodielectric materials with a customizable combination of electrical, mechanical and thermal properties as well as being responsive to both external stimuli and internal changes for addressing the challenges associated with the rapidly rising energy need. We are also interested in gaining insightful understanding to the dielectric phenomenon (e.g., electric polarization and relaxation, charge transport) in the nanodielectrics, especially that occurs in the vicinity of interfacial regions. Our recent work focuses on high-energy-density and high-temperature film capacitor dielectrics, smart dielectrics and ferroelectric polymer nanocomposites for energy conversion.