Positive Electrode Material, And Positive Electrode And Lithium Secondary Battery Comprising Same

Abstract: The present invention relates to a positive electrode material for a lithium secondary battery, the positive electrode material comprising a first positive electrode active material and a second positive electrode active material, wherein the first positive electrode active material includes a lithium transition metal oxide in which the molar ratio of nickel among the transition metals is at least 70 mol%, the second positive electrode active material includes a lithium transition metal oxide in which the molar ratio of nickel among the transition metals is at least 25 mol% lower than the molar ratio of nickel among the transition metals in the first positive electrode active material, the average particle diameter of primary particles constituting the second positive electrode active material is larger than the average particle diameter of primary particles constituting the first positive electrode active material, and the D50 of the second positive electrode active material is smaller than the D50 of the first positive electrode active material.

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