Abstract
The formation of the ternary oxide thin films on nickel substrates in LiOH solution was studied under hydrothermal or electrochemical–hydrothermal conditions. While the purely hydrothermal treatment of nickel substrates at 150°C leads to the formation of Ni(OH) 2 films, by the use of the electrochemical–hydrothermal approach under supplementary galvanostatic charge with the same hydrothermal conditions, LiNiO 2 films are directly fabricated. The structural purity and chemical composition of the obtained films were confirmed by X-ray diffraction pattern analysis and X-ray photoelectron spectroscopy, respectively. The fabricated films show, according to X-ray diffraction, a good crystallinity without any post-synthesis annealing. In comparison with the fabrication of Ni(OH) 2 films by the hydrothermal method, it has been found that the electrochemical anodic process is necessary to obtain the desired LiNiO 2 films.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have