| abstract |
A method for preparing a transition metal compound precursor, which comprises the step of introducing a transition metal aqueous solution, a polymer additive, an ammonia solution and an alkalizing agent into a reactor and performing stirring to perform a coprecipitation reaction, a transition metal compound precursor produced thereby, And a cathode active material containing the same. By performing the coprecipitation reaction under specific reaction conditions using a polymer additive, a transition metal compound precursor having a specific average particle diameter and shape can be produced. Further, by using the transition metal compound precursor produced by the above method, not only the average particle size and shape of the lithium transition metal oxide but also the specific surface area and the tap density can be controlled, thereby further improving the initial capacity of the lithium secondary battery . |