Patent ID: 7303837

Claim:
A positive electrode for a lithium-sulfur battery comprising: a distributed mixture of a positive active material, a conductive agent, an organic binder and polyethyleneimine, wherein the positive active material includes at least one selected from the group consisting of elemental sulfur, a sulfur-based compound, and a mixture thereof, the polyethyleneimine has a weight-average molecular weight of 30,000 to 120,000 and the amount of the polyethyleneimine is 5 to 50 parts by weight based on 100 parts by weight of the binder, and the organic binder is selected from the group consisting of polyvinyl pyrrolidone, poly(methyl methacrylate), polyvinylidene fluoride, a copolymer of polyhexafluoropropylene, polyethyl acrylate, polytetrafluoroethylene, polyvinyl chloride, polyacrylonitrile, polycaprolactam, polyethylene terephthalate, polybutadiene, polyisoprene, polyacrylic acid, derivatives thereof, blends thereof, and copolymers thereof.