Flexible cyclic-olefin with enhanced dipolar relaxation for harsh condition electrification
Chao Wu, Ajinkya A. Deshmukh, Omer Yassin, Jierui Zhou, Abdullah Alamri, John Vellek, Stuti Shukla, Michael Sotzing, R. Casalini, Gregory A. Sotzing, Yang Cao
Abstract
Significance Flexible polymer dielectrics operable under not only electrical but also thermal extremes are desired for high-power-density and high-payload-efficiency electrification. Unfortunately, state-of-the-art high-temperature polymers exhibit largely reduced electrical energy storage performance, as traditionally their bandgaps are inversely correlated to the dielectric constants. Here, an all-organic polymer was reported with high dielectric constant originating from the enhanced dipolar relaxation, an uncompromised large bandgap of 4.84 eV, and a high glass transition temperature of 178 °C by locally decoupling the conjugation of polymer backbones. This rational strategic design uncovers a large unexplored space for the design of polymer dielectrics for multiple harsh conditions.