Electrochemical investigation and capacitance properties of a novel electrodeposited ordered mesoporous cobalt hydroxide films

摘要

The present work explored a novel, simple and low cost electrochemical route for the investigation of ordered mesoporous cobalt hydroxide films electrodeposited onto gold substrate from cobalt acetate in pluronic lyotropic liquid crystal (P84). This method produces thin films of cobalt hyhdroxid mesostructures on gold substrate by combination of potentiostatic and voltammetric electrodeposition techniques. The prepared nanomaterials were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and x-ray diffraction (XRD). Electrochemical capacitance properties of cobalt hydroxide films were evaluated via cyclic voltammetry method. The film showed maximum specific capacitance of 727 F/g in 1 M sodium hydroxide electrolyte at scan rate of 5 mV/s. This indicates the potential application of cobalt films in electrochemical supercapacitors.