Editorial: Polymers for high electric field applications

Polymers have been found to have wide applications in power equipment, due to their excellent electric insulation properties, energy storage performance, and mechanical behaviors. The continuous development of electric systems towards higher voltages, larger capacity, miniaturization, and a stringent environment has posed an increasing challenge for the investigation of polymeric materials. Attention has been directed towards polymeric dielectric properties, charge transportation/space charge, electric breakdown, interfacial phenomenon, and treeing, etc., to increase electric performances. These properties rely on the morphological and molecular structure of the polymer, particularly on its crystalline and amorphous phase and long-period and interfacial structures. The authors of this Research Topic have reported the in-depth investigations being conducted in this field.