| abstract |
The present invention relates to a lithium-sulfur battery containing a separation membrane in which an adsorption layer comprising a radical compound having a nitroxyl radical region is formed, and more particularly, a lithium-sulfur battery in which a layer of adsorption, which contains a conductive material and a radical compound having a nitroxyl radical region, is applied to a surface of a separation membrane to suppress the elution of lithium polysulfide. In the lithium-sulfur battery according to the present invention, not only the elution and diffusion of lithium polysulfide which elutes from a positive electrode are prevented by adsorption by a radical compound which is a stable radical compound having a nitroxyl radical region, but positive electrode active material reaction sites are provided by providing additional electrical conductivity. As a result, the capacity and battery life properties are improved. |