Cathodic Deposition of Flaky Nickel Sulfide Nanostructure as an Electroactive Material for High-Performance Supercapacitors

Abstract

In this study, a novel double-walled structure of PbO₂ electrodeposited into TiO₂ nanotube arrays was successfully fabricated by a pulse electrodeposition (PED) method. TiO₂ nanotubes (NT) were prepared by electrochemical anodization and used as a substrate to electrodeposit PbO₂. Then the major work focused on the investigation of the morphology and chemical composition of the Ti/TiO₂NT/PbO₂ anode. The electrochemical measurements were applied to analyze the electrochemical properties of the Ti/TiO₂NT/PbO₂ anode. The results of field emission-scanning electronic microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and X-ray photoelectron spectra (XPS) revealed that lead dioxide nanoparticles have been successfully electrodeposited into TiO₂NT walls without blocking the tubes. The electrochemical measurements indicated the electrodeposition time of PbO₂ have an obvious impact on anode electrochemical activity, because of its influence on the active areas of the anode. The bulk electrolysis demonstrated that the Ti/TiO₂NT/PbO₂ anode presented excellent electrocatalytic performance for degradation of phenol which containing 17.53 g·L⁻¹ NaCl at the current density of 30 mA·cm⁻².