Ni-rich cathode material is attracting attention as a commercial material for achieving a high capacity at a low price. However, this material has limitations due to the Ni-rich associated electrochemical instability. Therefore, although performance improvement is achieved through various surface coating methods, it remains unknown whether the performance improvement is due to the material and coating method or the homogeneity of the coating coverage. In this study, the electrochemical performance of lithium-ion batteries and the relationship to the precursor coating coverage was analyzed with a transition metal material. Lithium-cobalt and lithium-tin precursors were dissolved in an ethanol solution-based sol-gel process, applying different stirring speeds (200 rpm and 600 rpm) to vary the precursor coating coverage on surface of commercial LiNi0.8Co0.1Mn0.1O2. In the case of the lithium-cobalt precursor, the coating coverage increased as the stirring speed increased, but in the case of the lithium-tin acetate precursor, the coating coverage decreased as the stirring speed increased. Despite their differences, both showed relatively good electrochemical performance when the coating coverage was widespread, irrespective of the applied coating method. The physical properties of the coated cathode material were analyzed using SEM and XRD, and the electrochemical performance was investigated through initial charge/discharge capacity, cycle stability and rate characteristic tests.