Method of manufacturing lithium secondary battery

A method of manufacturing a lithium secondary battery, the method comprising the steps of:

• preparing a metal foam having a plurality of first pores;
• filling a slurry made by mixing a positive electrode active material, a binder, a conductive material and an organic solvent into the first pores of the metal foam;
• removing the organic solvent in the slurry by heat-treating the slurry-filled metal foam, to thereby adhere the positive electrode active material, the binder and the conductive material on inner walls of the first pores, and thus obtain a metal foam positive electrode in which second pores smaller than the first pores are formed in the first pores;
• coating an electrolytic solution on a surface of the metal foam positive electrode to thereby penetrate the electrolytic solution into the second pores;
• and
• sequentially laminating a separator and a negative electrode on both surfaces of the metal foam positive electrode into which the electrolytic solution has been penetrated.