NEGATIVE ELECTRODE ACTIVE MATERIAL, METHOD FOR PREPARING SAME, SECONDARY BATTERY AND APPARATUS INCLUDING THE SECONDARY BATTERY

The present application discloses a negative electrode active material and a method for preparing the same, a secondary battery, and an apparatus including the secondary battery. The negative electrode active material includes a core and a coating layer covering the surface of the core, the core includes artificial graphite, the coating layer includes amorphous carbon, and the particle size uniformity of the negative electrode active material is from 0.25 to 0.45.