SXRD study of the crystal structure transformation in Li2+xMo1-xO3 cathode materials for Li-ion batteries

Li2MoO3 is considered as a promising building block for the design of next-generation Li–rich layer-structured cathode materials. Furthermore, Li2MoO3 with performed Mo to M (M = Ti, Sn) substitutions may be interesting model systems for investigation of the irreversible transition metal cations migration and associated voltage fade phenomena in Li-rich layered oxides. Transmission electron microscopy studies (HAADF-STEM imaging, selected area electron diffraction) and preliminary laboratory X-ray powder diffraction investigation allowed us to discover the dependence of Li2+xMo1-xO3 crystal structure on the chemical composition and demonstrate the appearance of structural disordering in samples annealed at different temperatures. The aim of this experiment is to investigate the relationship between the chemical composition and crystal structure, explore the evolution of crystal structure depending on temperature and resolve phase transitions.