NEGATIVE ELECTRODE ACTIVE MATERIAL FOR SECONDARY BATTERY, METHOD OF PRODUCING THE SAME, AND NEGATIVE ELECTRODE FOR SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY INCLUDING THE SAME

The present invention relates to a negative electrode active material for a secondary battery including: natural graphite; and a carbon coating layer formed on a surface and in an inside of the natural graphite, wherein the negative electrode active material for a secondary battery has a porosity of 3% to 13%.