fig2

Figure 2. (A) Cell-level energy density in pouch cells as a function of E/S ratio and sulfur loading (sulfur capacity = 1,200 mAh g^-1, sulfur fraction = 70%, N/P ratio = 2); (B) Cell-level energy density in pouch cells as a function of sulfur fraction and sulfur loading (sulfur capacity = 1,200 mAh g^-1, E/S ratio = 2 μL mg^-1, N/P ratio = 2); (C) Cell-level energy density in pouch cells as a function of sulfur capacity and sulfur loading (sulfur fraction = 80%, E/S ratio = 2 μL mg^-1, N/P ratio = 2). The calculations in (A-C) were performed based on the energy density formulation reported in Ref.^[2]; (D) Approximate number of publications over the past 20 years based on keyword searches. “LSB” corresponds to publications identified using the keywords “Li-S battery,” “Li-S batteries,” “lithium-sulfur battery,” or “lithium-sulfur batteries,” while “LSB + thick electrode” corresponds to publications identified using the keywords “thick electrode,” “thick electrodes,” “high sulfur loading,” “high areal loading,” or “high mass loading.” Data source: Web of Science. LSB: Lithium-sulfur battery; E/S: electrolyte-to-sulfur; N/P: