Research Progress of High-temperature Resistance Polymer-based Energy Storage Dielectric Materials
Polymer-based dielectrics are widely used in metalized film capacitors because of their high breakdown strength,excellent processability,and low cost.Nowadays the most commonly used energy storage dielectric material is biaxially oriented polypropylene(BOPP),which has defects such as low discharged energy density and large dielectric losses at high temperatures.Therefore,improving the performance of energy storage density and high-temperature re-sistance of polymer-based dielectric materials is an important issue in the field of dielectric energy storage.This paper reviews the application progress of new polymer-based dielectric materials in the field of high-temperature dielectric en-ergy storage in recent years.Firstly,the charging and discharging principle of dielectric materials and the key parameters that determine the energy storage density of dielectric materials are introduced.Then,the latest research progress of high-temperature resistance dielectrics is reviewed from three aspects:dielectrics with high glass transition temperature,crosslinking dielectrics,and dielectrics with charge traps.Finally,the prospects in development direction of poly-mer-based high-temperature resistance dielectrics are concluded.
polymer based dielectricscharged energy densitydischarging efficiencyenergy losshigh temperature re-sistance
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