LITHIUM-SULFUR BATTERY WITH IMPROVED ENERGY DENSITY AND OUTPUT

Disclosed is a lithium-sulfur battery with improved energy density and power, which can simultaneously realize energy density per battery weight of 300 Wh/kg or more and maximum power of 2 kW/kg or more by setting the ratio of the mass of sulfur in the positive electrode to the mass of the electrolyte and the loading value of sulfur for the positive electrode to a specific range. The lithium-sulfur battery comprises a positive electrode containing sulfur as a positive electrode active material, a lithium metal negative electrode, and an electrolyte, and satisfies Equation 1 below: 1 ≤ ES / L ≤ 1 .4 wherein ES is the value obtained by dividing the mass (g) of the electrolyte by the mass (g) of sulfur contained in the positive electrode, and L is the loading value of sulfur for the positive electrode and its unit is mAh/cm.