Suppressing the Loss of Polymer‐Based Dielectrics for High Power Energy Storage

Abstract Polymer‐based dielectrics have received intensive interest from academic community in the field of high‐power energy storage owing to their superior flexibility and fast charge–discharge ability. Recently, how to suppress the loss of polymer‐based dielectrics has been increasingly recognized as a critical point to attain a high charge–discharge efficiency in the film capacitors. Some achievements are made in analyzing the source of loss and suppressing loss via Edison's trial and error method. In this review, the significance of suppressing loss in polymer‐based dielectrics is firstly emphasized. Then, different sources of loss are discussed carefully and an in‐depth analysis of the related measurements is presented. Next, recent research results in suppressing loss are summarized and discussed in detail according to different strategies. Finally, the challenges and opportunities in the loss suppression research for the rational design of high‐efficiency polymer‐based dielectrics are proposed.