Multiple polarizations and nanostructure of double-stranded conjugated block copolymer for enhancing dielectric performance

The double-stranded conjugated triblock copolymers are synthesized by tandem metathesis cyclopolymerization and ring-opening metathesis polymerization. They display high permittivity of 28–26, low dielectric loss of 0.06–0.02, and good stored/released energy density of 2.96–2.89/2.58–2.75 J cm⁻³ at 245 MV m⁻¹ accompanied with the excellent charge-discharge efficiency of 87.2–95.2% when the copolymers self-assemble into a core-shell nanostructure, which are better than those of both homopolymer and copolymers without nanostructure.