A STRUCTURE OF COMPLEXED CATHODE USING LI2S

摘要

The present invention is to improve life of a lithium-sulfur battery. A sulfur positive electrode is a solid sulfur in a fully charged state, and is Li_2S in a fully discharged state. The Li_2S has a volume corresponding to 180% of the sulfur. If charging and discharging is repeated, the positive electrode structure of the lithium-sulfur battery is collapsed by accompanying volume expansion and shrinkage. The present invention has a positive electrode structure surrounded by combined Li_2S powder with a conductive material. The structure of the present invention maintains a structure suitable for a volume expanded active material, and thus avoids collapse of the positive electrode structure caused by volume expansion even when going through repetitive charging and discharging cycles, thereby improving life of the lithium-sulfur battery.