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Effect of thermal annealing on the structure of LiCoO2 powders prepared by co-precipitation method
Author(s)
Khejonrak, Awadol
Chanlek, Narong
Triamnak, Narit
Chirawatkul, Prae
Kidkhunthod, Pinit
Suttapun, Manoon
Manyum, Prapan
Rujirawat, Saroj
Songsiriritthigul, Prayoon
Yimnirun, Rattikorn
Date Issued
December 1, 2021
Type
Article
Abstract
Lithium cobalt oxide (LiCoO2) powder was prepared by co-precipitation method and annealed at different temperatures of between 300 and 700 °C. The effect of annealing temperature and effect washing process with deionized water on the crystal structures of the prepared LiCoO2 powders were thoroughly studied by Synchrotron powder X-Ray Diffraction (Syn-XRD), X-ray Absorption Spectroscopy (XAS), Dispersive Raman Microscopy (Raman) techniques. The change in chemical composition as a function of annealing temperature was also investigated by X-ray Photoelectron Spectroscopy (XPS) technique. The crystal structural results identified the phase evolution of the prepared LiCoO2 powders upon heat treatment. The formation of HT-LiCoO2 phase was observed at annealing temperature as low as 300 °C.
Citation
Radiation Physics and Chemistry, 189, 2021