Electrochemical capacitance of polypyrrole–titanium nitride and polypyrrole–titania nanotube hybrids

摘要: Both polypyrrole–titanium nitride (PPy–TiN) and polypyrrole–titania (PPy–TiO2) nanotube hybrids have been prepared by incorporating electroactive polypyrrole into well-aligned titanium titania arrays through a normal pulse voltammetry deposition process. Microstructure characterization shows that the polypyrroles fully coated on to form coaxial heterogenous nanohybrids. The galvanostatic charge–discharge measurements indicate PPy–TiN PPy–TiO2 specific capacitances of 1265 382 F g−1 at current density 0.6 A g−1. similar cyclability, exhibiting stable 459 72 after 2000 cycles high 15 highly conductive substrate can promote electrochemical capacitance more significantly, as compared semiconductor, contributing higher supercapacitance performance PPy–TiN. This indicates be suitable act supercapacitor electrode materials.