Research Progress of All Organic Polymer Dielectrics for Energy Storage from the Classification of Organic Structures

Dielectric films are the foundation of power electronic equipment for energy storage in capacitors. However, typical dielectric films exhibit undesirable energy storage density and thermal stability, limiting its further application in the advanced field. For both pure polymers and composites-based dielectrics, the macromolecular matrix greatly determines the performances. This paper summarizes the research progress of all-organic polymer materials for the dielectric application from the perspective of molecular structure design. Systematic comparisons on properties, including dielectric constant and dielectric loss, glass transition temperature, and energy density are given, expecting to inspire researchers to devote further efforts in this area. An outlook for the future of all-polymer dielectrics is also presented.