Comment on ‘in situ visible Raman spectroscopic study of phase change in LiCoO2 film by laser irradiation’

SHFY [S.-W. Song, K.-S. Han, H. Fujita, M. Yoshimura, Chem. Phys. Lett. 344 (2001) 299], reported recently the observation of a structural phase transition in LiCoO2/Co films from the layered trigonal phase to the cubic spinel phase and improvement in crystallization of the spinel phase under laser irradiation. Our analysis indicate that their results are more consistent with the formation of Co3O4 instead, their Raman data caring the specific fingerprints of this latter.