Alkali metal-sulfur batteries with high volume and weight energy densities

摘要

(a) an anode; (b) a cathode active material slurry comprising (i) a cathode active material dispersed in an electrolyte; and (ii) a cathode having a conductive porous structure that serves as a 3D cathode current collector having at least 70% by volume of pores (the cathode active material slurry is a conductive porous Wherein the cathode active material is selected from sulfur, lithium polysulfide, sodium polysulfide, a sulfur-polymer composite, a sulfur-carbon composite, a sulfur-graphene composite, or a combination thereof; And (c) comprising a separator disposed between the anode and the cathode, the cathode thickness-to-cathode current collector thickness ratio is 0.8 / 1 to 1 / 0.8, and / or, the electrode active material supply amount of the cathode active material is 15 mg / cm ² than And the 3D porous cathode current collector has an alkali metal-sulfur battery having a thickness of 200 mu m or more (preferably, greater than 500 mu m).