Lithium Sulfur Battery

Abstract: The present invention relates to a lithium-sulfur battery and a method for evaluating the output characteristics of the lithium-sulfur battery, the lithium-sulfur battery comprising: a positive electrode; a negative electrode; a separator interposed between the positive electrode and the negative electrode; and an electrolyte, wherein the positive electrode includes a positive electrode active material containing a sulfur-carbon composite, and the lithium-sulfur battery has a ratio R(1.0C/0.5C) of 80% or more according to relation 1. The lithium-sulfur battery has sufficient energy density and capacity even if discharged at a high rate. [Relation 1] R(1.0C/0.5C) = [A(DOD 100)1.0C / A(DOD 100)0.5C] X 100 (%) In relation 1, A(DOD 100)1.0C is the amount of lithium sulfide (Li2S) that is discharged to 1.0C and is present in a DOD 100 state, and A(DOD 100)0.5C is the amount of lithium sulfide (Li2S) that is discharged to 0.5C and is present in a DOD 100 state.

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