Interfacial Effect on Dielectric Properties of Self-Assembled Polythiourea-Based Copolymers for Ultrahigh Energy Storage

Back Cover: In article number 2100700 by Yang Feng, Shengtao Li, and co-workers, a new amphiphilic block copolymer with clear phase separation shows an extraordinarily high energy density of 29.8 J cm⁻³. This is because the coiled block molecule in the interfacial region can substantially improve the breakdown strength from 652 MV m⁻¹ to 1166 MV m⁻¹, while maintaining a high dielectric constant of 5 and a low loss of <0.01.