Synthesis and Electrochemical Insertion Properties of the Layered Li_xMoO_2 Phases (x = 0.74, 0.85, and 1.00)

摘要

Li_(0.74)MoO_2, Li_(0.85)MoO_2, and Li_(1.00)MoO_2 have been synthesized using a carbothermal reduction approach. X-ray diffraction indicates that the phases all possess a hexagonal layered structure related to alpha-NaFeO_2. Preliminary electrochemical evaluation suggests that specific capacities close to theoretical may be attained for the Li_(0.85)MoO_2 and Li_(1.00)MoO_2 compounds. High-resolution measurements reveal the presence of multiple phase transitions during the lithium insertion process with formation of an ordered composition close to x = 0.5 in Li_xMoO_2. The carbothermal approach appears to offer an economical method for the commercial synthesis of various single-phase compounds in the Li-Mo-O phase diagram.