| abstract |
The present invention comprises the steps of mixing the first positive electrode active material precursor having a mean particle diameter (D 50 ) of 10 μm to 30 μm and a lithium-containing raw material, and calcining to obtain a first plastic product; Mixing the first positive electrode active material precursor with a second positive electrode active material precursor having a different average particle diameter (D 50 ) and a lithium-containing raw material, and calcining to obtain a second plastic product; Crushing the first plastic product and the second plastic product, respectively; And mixing the pulverized first plastic product and the crushed second plastic product, and subjecting to sintering to obtain a positive electrode material, comprising: a method for manufacturing a positive electrode material, a positive electrode material prepared by the manufacturing method, and the positive electrode material It relates to a lithium secondary battery positive electrode and a lithium secondary battery comprising a. |