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

Abstract

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.

Effect of Interfacial Polarization on the Trap Passivation and Dielectric Constant of SrF2/TiO2 for Dye-Sensitized Solar Cells

“…The cubic and hexagonal bipyramidal particles thus offer a multifaceted structure that could increase the interface with the semiconducting TiO 2 nanoparticles. A high SrF 2 /TiO 2 interface could enhance the interfacial polarization, which tends to increase the ε′ of a hybrid material , by filling the trap state. Figure d–fpresents X-ray elemental maps for the SrF 2 particles, verifying the formation of SrF 2 and the distribution of Sr and F ions.…”