Patent ID: 7241535

Claim:
A lithium-sulfur battery having an electrolyte comprising: a salt having an organic cation and which dissolves a sulfur-based positive active material of the lithium-sulfur battery and has a high ion conductivity, a content of said salt being 0.001% to 20% by volume based on the total electrolyte and wherein the lithium-sulfur battery further comprises a positive electrode having a sulfur and/or a sulfur compound as a positive active material wherein the positive active material is selected from the group consisting of an elemental sulfur, Li 2 S n (n≧1), Li 2 S n (n≧1) dissolved in catholytes, an organosulfur compound, and a carbon-sulfur polymer ((C 2 S x ) n : ×=2.5˜50, n≧2).