NEGATIVE ELECTRODE ACTIVE MATERIAL, METHOD OF PREPARING THE NEGATIVE ELECTRODE ACTIVE MATERIAL, NEGATIVE ELECTRODE, AND SECONDARY BATTERY INCLUDING THE NEGATIVE ELECTRODE

A negative electrode active material which includes a core including artificial graphite, and a carbon coating layer disposed on the surface of the core, wherein an edge plane of the negative electrode active material has a specific surface area of 1.0 m/g to 1.9 m/g, a negative electrode including the same, and a secondary battery including the negative electrode.