Preparation and electrochemical properties of phenanthroline copper coordination Schiff base conducting polymers

Preparation and electrochemical properties of Schiff base OTTP prepared from o-toluidine and p-benzaldehyde polymers doped with various proportions of phenanthroline copper complexes. The copper coordination polymer [Cu(Phen)Cl-2](X)-OTTP (X was the molar ratio of Schiff base to phenanthroline copper coordination complex, X=1, 0.8, 0.6, 0.4, 0.2) of Schiff base phenanthroline was synthesized by doping different proportions of phenanthroline copper complexes in Schiff base. The morphology and structure of the products were investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FT-IR), and the electrochemical performance of the electrode materials [Cu(Phen)Cl-2](X)-OTTP were analyzed by cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), and electrochemical impedance spectrum (EIS). The results exhibited that the morphology of the polymer Schiff base changed after doping with phenanthroline copper complexes. After doping, the Schiff base was scaly, with more holes on the surface and the layered structure was destroyed. The matrix pi-pi stacking was affected. In 6 mol.L-1 KOH electrolyte three-electrode system, [Cu(Phen)Cl-2](0.4)-OTTP had a high specific capacity of 278 mAh.g(-1) at the current density of 0.5 A.g(-1). The assembled supercapacitor [Cu(Phen)Cl-2](0.4) - OTTP//AC (AC=activated carbon) had a power density of 276.99 W.kg(-1) at the energy density of 26.16 Wh.kg(-1), and kept original specific capacity of 97.13% after 10 000 GCD cycles at current density of 10 A.g(-1).