One-pot synthesis of Vanadium-doped conducting polymers for using as electrode materials of supercapacitors

In this study, vanadium-doped polyaniline and vanadium-doped polypyrrole were made by chemical synthesis method, with the addition of vanadium species used as oxidant for the first time in the literature. The prepared vanadium-doped conductive polymers were characterized spectroscopically, microscopically, and physically. In this context, vanadium-containing species both covalently doped to the structure of conductive polymers and adsorbed were determined by XPS and FT-IR analyzes. After characterizing the vanadium-doped conductive polymers prepared using chemical synthesis method, they were used as electrode material in asymmetric type supercapacitors. The highest areal capacitance was determined in VDPA including supercapacitor as 453 mF.cm(-2) at a scanning speed of 5 mV.s(-1). In long-cycle tests, it was determined that this system retained 70.9% of its initial capacity at the end of 1000 cycles. The data obtained in this study, which is the first to demonstrate the supercapacitor application of vanadium-doped conductive polymers, show that these material compositions have a high capacitance value and form an important basis for future studies.

Automated summary

Vanadium-doped polyaniline and vanadium-doped polypyrrole were synthesized using a chemical method with vanadium species as an oxidant for the first time. The prepared vanadium-doped conductive polymers were characterized spectroscopically, microscopically, and physically. XPS and FT-IR analyses confirmed the covalent and adsorbed presence of vanadium species in the conductive polymers. These vanadium-doped conductive polymers were then used as electrode materials in asymmetric supercapacitors, exhibiting a highest areal capacitance of 453 mF.cm(-2) at a scanning speed of 5 mV.s(-1). In long-cycle tests, the system retained 70.9% of its initial capacity after 1000 cycles. This study, demonstrating the supercapacitor application of vanadium-doped conductive polymers, highlights their high capacitance value and provides a basis for future research.