Lithium secondary battery

A lithium secondary battery comprising:

• a cathode active material comprising a lithium iron phosphate having an olivine crystal structure and a conductive carbon, where the conductive carbon is directly disposed on the surface of the lithium iron phosphate;
• and
• an anode active material comprising amorphous carbon,
• wherein the lithium iron phosphate comprises second particles in which first particles are physically aggregated,
• wherein the surfaces of the first particles and the second particles are each coated with the conductive carbon,
• wherein the first particles have an average particle size of 1 nanometer to 300 nanometers and having a coating of the conductive material having a thickness ranging from 0.1 nm to 10 nm, and the second particles have an average particle size of 4 micrometers to 15 micrometers and having a coating of the conductive material having a thickness ranging from 0.1 nm to 20 nm,
• wherein an amount of the conductive carbon is greater than 2 wt % and 5 wt % or less, based on a total weight of the cathode active material,
• wherein the lithium iron phosphate having the olivine crystal structure is LiFePO4,
• wherein the amorphous carbon is soft carbon, and
• wherein the amorphous carbon has an average particle size of 8 micrometers to 15 micrometers.