Abstract:
The present invention relates to a cathode active material for a lithium secondary battery, the material having an ultra high capacity, and a manufacturing method thereof, and more specifically, to a manufacturing method of a cathode active material for a lithium secondary battery including: selecting two elements among nickel, cobalt, iron, manganese and aluminum and preparing a metal aqueous solution; mixing a precipitant and a co-precipitant in the metal aqueous solution and putting and stirring the mixture in a continuous reactor to obtain a precipitate; filtering, washing and drying the precipitate to prepare a precursor; and mixing a lithium salt and aluminum with the precursor. The cathode active material has a remarkably superior capacity compared to that of a previously reported NCA-based material through a change in the content of aluminum and lithium and has a structure with an excellent capacity and life time characteristics since the cathode active material includes transition metals mixed therewith.