Co/Mn-Coated LiNiO2 Cathode Materials by Solid-State Reaction at Room Temperature

Preparation of Co/Mn-coated LiNiO2 cathode materials by solid-state reaction at room temperature was described. The mechanism of Co/Mn hydrate coated Ni(OH)2 by solid-state reaction at room temperature was investigated. The structure, morphology and surface composition of the uncoated and coated particles were studied with XRD, SEM, TEM and EDS. The TEM result shows a thin film is coated on the surface of LiNiO2 particles. XPS results show Co/Mn elements are coated on the surface of LiNiO2 particles. SEM and EDS results indicate that the coating of Co/Mn layer uniformly covers the surface of spherical LiNiO2 particles. The electrochemical performances results show LiNiO2 cathode materials have a good cycleability by the Co/Mn coating.