Preparation strategy and composition design of polymer-based layered composites for improving energy storage performances

Dielectric capacitors have extremely high discharge rate and power density. With the development of electronic power systems, the demand for dielectric capacitors with high energy storage density is increasing. Improving the energy storage performance of dielectric materials is the key to the development of high-performance dielectric capacitors. Innovation of composites represents a promising approach, which has the potential of combining the high breakdown strength of the polymer matrix with the high dielectric constant of the ceramic fillers to realize high energy density. The layered polymer-based composites are expected to solve the existing contradiction between the dielectric constant and the breakdown electric field in the single-layer composite material and improve the discharge energy density. This work summarized the preparation strategy and composition design of the layered polymer-based dielectric composites in various countries in the world in recent years to provide new and constructive strategies for the development of high-end layered dielectric materials for electrostatic energy storage applications.