Abstract
Thin film of Li-doped nickel oxide was prepared by the electrostatic spray deposition (ESD) technique onto a Pt coated silicon wafer and Pt coated alumina substrate with different deposition temperatures. Crystal structure, surface morphology and electrochemical properties of the LixNi1-xO film were studied by means of X-ray diffraction (XRD), scanning electron microscopy (SEM) and cyclic voltammetry. It is found that the deposition temperature had a significant impact on the structure, surface morphology and the number of electrochemically active site of the Li-doped nickel oxide and their corresponding electrochemical properties for the Li-doped nickel oxide film prepared by the ESD technique. The Li0.1Ni0.9NiO film deposited at 200°C exhibits the maximum specific capacitance of 251 F/g with a high rate capability in 1 M KOH solution. This relatively high specific capacitance of this film was originated from its unique highly porous surface morphology and amorphous structure.
Original language | English |
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Pages (from-to) | 467-472 |
Number of pages | 6 |
Journal | Electrochemistry |
Volume | 69 |
Issue number | 6 |
DOIs | |
State | Published - Jun 2001 |
Keywords
- Amorphous structure
- Electrostatic spray deposition
- Li-doped nickel oxide
- Surface morphology