High temperature energy storage and release properties of polyimide nanocomposites simulated by considering charge trapping effects

Dielectric energy storage capacitors with excellent high temperature resistance are essential in fields such as aerospace and pulse power. However, common high-temperature resistant polymers polyimide (PI) polyether sulfone have low densities efficiencies at temperature, which greatly limited practical applications. The polymer nanocomposites prepared by doping modification can regulate the charge injection transport process, improve performance. quantitative relationship between trapping performance of linear still needs further study. An release model considering effects is constructed authors. We simulate properties nanocomposite dielectrics (PI PNCs) different barriers trap parameters 150°C. A triangular voltage applied to electrodes both sides PI PNCs, electric displacement-electric field loop simulated, discharged calculated. simulation results consistent experimental results. Increasing barrier, deep density effectively reduce carrier mobility, thereby improving dielectric capacitors. In case barrier (1.3 eV), increase (0.7–1.5 eV) (1 × 1021–1 1025 m−3), changes from 0.20 1.44 Jcm−3, efficiency 9.0% 99.9%, improves significantly. This research provides theoretical support for improvement nanocomposites.