Synthesis of different new copolyimides and influence of different molar ratios of diamines and dianhydride on pseudocapacitance performance of p-type conductive polymer

In the present work, poly ortho aminophenol/copolyimides (POAP/PI) composites were prepared using PIs together with POAP. PIs were synthesized using different molar ratios of diamines and dianhydride by polymerization method. Different electrochemical methods including cyclic voltammetry (CV), galvanostatic charge/discharge (GCD) and electrochemical impedance spectroscopy (EIS) were applied to study system performance. Presence of PIs in the composite films improved mechanical and electrochemical performance of the p-type conductive polymer. This study reveals that POAP/PI with high specific capacitance and long cycle-life is suitable for application in energy storage materials. [Display omitted] •POAP/PI composites were prepared by chemical and electrochemical methods.•PIs improve the mechanical properties of electrodes.•POAP/PI composites show higher electrochemical performance than POAP.•POAP/PI composites exhibit excellent specific capacitance and good cycle stability.