Lithium-sulfur battery

Abstract

A lithium-sulfur battery with improved lifetime performance is provided. The lithium-sulfur battery comprises an electrolyte including a first solvent containing fluorine-based ether compounds, a second solvent containing a glyme-based compound, and a lithium salt containing lithium bis (pentafluoroethanesulfonyl) imide; and a positive electrode including an active material containing sulfur and carbon material, and can utilize 80% or more of the theory discharging capacity of sulfur and can operate for a long life, by using an electrolyte system of SSE excluding nitrile solvents and at the same time applying a carbon material with a high specific surface area to the positive electrode.

Dependencies are inferred from the claim text.