High-dielectric-constant polymer-based elastomeric dielectrics for soft electronic devices

Polymer-based elastomeric dielectrics have demonstrated significant application prospects in flexible electronic skins, dielectric actuators, and energy harvesting and storage due to their light weight, tunable structures, and mechanical flexibility. A key focus in developing polymer-based dielectric elastomers is the simultaneous enhancement of dielectric constant and breakdown strength, along with the reduction of dielectric loss, without compromising mechanical flexibility. This review summarizes recent advances in the design and preparation of high-dielectric-constant (high-k ) polymer-based elastomeric dielectrics, with special emphasis on strategies for balancing and improving both dielectric and mechanical properties. Finally, we summarize and provide an outlook on the application fields of polymer-based elastic dielectric materials.