With increasing demands for high-energy lithium-ion batteries, nickel-rich cathode materials have been considered as promising candidates due to their high reversible capacity and low cost. Although some of the materials with nickel contents <60% were commercialized, there are tremendous obstacles for further improvement of electrochemical performance, which is strongly related to the morphological and structural properties. In this regard, a specific study on morphology and structural engineering based on conventional co-precipitation methods have been intensively studied. Also, I highlight the importance of designing cathode material in particle, electrode, and cell level.