High?Energy?Density Waterborne Dielectrics from Polyelectrolyte?Colloid Complexes

To meet the demands of miniaturization and integration next-generation power systems, a major challenge is to improve energy density used dielectric capacitors. Polymer nanocomposites are great potential for high-energy-density However, most them prepared via melt blending at high temperatures or solution processing in hazardous organic solvents, which consuming environmentally problematic. It has long remained economically ecologically challenging develop new materials. Here, class dielectrics made by electrostatically complexing polyvinylidene fluoride (PVDF) latex with oppositely charged chitosan an aqueous phase reported. At charge neutralization point, film [email protected] complexes demonstrates highest breakdown strength (630 MV m?1) recoverable (10.1 J cm?3), respectively 279% 421% higher than bare PVDF film, far beyond conventional solvent- melt-processed polymer films. The largely improved capacitive performances ascribed significant minimization losses critical point. concept can be extended wide range colloids, including polystyrene bentonite suspension, highlighting versatility proposed approach friendly high-performance