Preparation and the active material precursor powder used therein of the positive electrode active material for a rechargeable lithium battery

Without the use of pore forming agent, resulting in higher battery characteristics, a method of producing a desired high positive electrode active material of the open pore ratios porosity is disclosed. In the this By firing the lithium mixed powder by reacting the granulated powder and the lithium compound, thereby obtaining a positive electrode active material for a lithium secondary battery comprising open pores.