Abstract
In this work, effect of coating time on the structural, compositional and morphological properties of MoO3-coated Al2O3 plate for application as an electrode material for ultracapacitor was investigated. The 1[Formula: see text]cm [Formula: see text] 1[Formula: see text]cm aluminum plate was anodized by an electrochemical plating technique at 12[Formula: see text]V for 20 and 30[Formula: see text]min, respectively. MoO3 film was then coated on anodized aluminum plate over a range of coating time (2–10[Formula: see text]min, in intervals of 4[Formula: see text]min) at an applied voltage of 6[Formula: see text]V with constant electric current of 1[Formula: see text]A. X-ray photoelectron spectroscopy (XPS), energy dispersive X-ray spectroscopy (EDX) and scanning electron microscopy (SEM) were employed in the characterization of the MoO3/Al2O3 plate obtained. The SEM results obtained indicated that the coating time significantly affected the roughness and the surface area of the samples. The EDX analysis revealed the chemical composition element of Mo, O and Al and the result from XPS confirmed the existence of MoO3.
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