| abstract |
Provided are a lithium ion secondary battery positive electrode active material having high volume capacity density, filling density and safety and excellent charge / discharge cycle durability, and a method for producing a granulated powder useful as a raw material. N element (N is at least one element selected from the group consisting of Co, Mn and Ni) and M element (M is a transition metal element other than N element, Al, Sn, Zn and alkaline earth metal) Coprecipitated particles are precipitated from an aqueous solution in which at least one element selected from the group consisting of elements is dissolved, desalted and spray-dried to obtain a granulated body having a substantially spherical shape. A method for producing a granulated powder characterized by |