| abstract |
The present invention is a lithium secondary battery comprising a positive electrode including a positive electrode active material, a negative electrode including a negative electrode active material, a separator and an electrolyte to isolate the positive electrode and the negative electrode, the negative electrode active material is graphite core particles; Metal particles on the graphite core particles; And a carbon coating covering the graphite core particles and the metal particles, wherein the carbon coating is 5 to 12 wt% with respect to 100 wt% of the negative electrode active material.n n n Therefore, the present invention can provide a secondary battery having improved discharge characteristics at low temperature by suppressing the volume change of the metal particles by setting the carbon film content to 5 to 12% by weight based on 100% by weight of the total negative electrode active material.n n n n Composite system, graphite core particle, metal particle, carbon film |