Superior High-Temperature Capacitive Performance of Polyaryl Ether Ketone Copolymer Composites Enabled by Interfacial Engineered Charge Traps

This work presents a facile strategy to significantly boost the capacitive performance of aromatic polymer with simple preparation process. At 150 °C, the composite films exhibit remarkable comparative performance, U e = 10.1 J cm −3 and η > 90%.