Superior Capacitive Energy Storage at High Temperature of All-Organic Aromatic Polymer via Enhancing Conjugate Angle between Benzene Rings

and 90% at 150 °C, 2.74-times the energy density of the pristine PI film. Simultaneously, the BAPP+BPADA film exhibits excellent discharge response and cycling charge-discharge stability, which have the potential to be applied in functional devices under extreme conditions. The work performs a superior energy storage all-organic film and offers a strategy that regulates the chains' spatial topological structure for future aromatic polymers for high-temperature energy storage.