Lg Chem, Ltd

Dong Ryoung Kang

Sang Soon Choi

Na Ri Park

Woo Ram Lee

Jun Ho Eom

Jae Geun Kim

Na Ri Kim

A positive electrode material, a positive electrode including the same, and a lithium secondary battery including the same are disclosed herein. In some embodiments, a positive electrode material includes a first positive electrode active material having a larger average particle diameter than a second positive electrode active material, wherein the first positive electrode active material and the second positive electrode active material are each independently a lithium transition metal oxide having a molar ratio of nickel of 80 mol % or more relative to the total molar amount of transition metals in the lithium transition metal oxide, and the positive electrode material satisfies Equation (1):0<{()/}×100≤10  Equation (1):wherein, in Equation (1), A denotes a particle strength of the first positive electrode active material, and B denotes a particle strength of the second positive electrode active material.

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Daejeon, South Korea

Dong Ryoung Kang