Influence of nanostructured VO-acetylacetonate coordination system with 2-(pyridin-4-ylmethylene) hydrazine-1-carbothioamide in pseudocapacitance performance of p-type conductive polymer composite film

In this work, first, VO-acetylacetonate coordination system with 2-(pyridin-4-ylmethylene) hydrazine-1-carbothioamide (VO(acac)(2)L) was synthesised via sonochemical routes. Then POAP/VO(acac)(2)L films were fabricated through electropolymerization of poly ortho aminophenol (POAP) in the presence of VO(acac)(2)L and used as the active electrode of an electrochemical supercapacitor (SC) with a significant electrochemical properties improvement. X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) was applied to characterise the structural state of the prepared samples. Also, some electrochemical methods such as electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and galvanostatic charge-discharge (GCD) were carried out for the system performance investigation. This work may open an avenue to develop efficient and robust nanocomposite materials for an energy storage device in an acidic medium.

Automated summary

In this study, a VO-acetylacetonate coordination system was synthesized to fabricate POAP/VO films for use as the active electrode of an electrochemical supercapacitor, resulting in significant improvement in electrochemical properties. Structural characterization was conducted using XRD and FESEM, while system performance investigation was carried out using electrochemical methods such as EIS, CV, and GCD. This work may lead to the development of efficient and robust nanocomposite materials for energy storage devices in acidic media.