Display omitted It was discovered that when the loading of the sulfur electrode is high, the utilization of the sulfur, which is controlled by the concentration of salt in the electrolyte, significantly increases with decreasing salt concentration. Sulfur utilization improvement and control of dissolved lithium polysulfide (LiPS; Li2Sx, 2 < x ≤ 8) are crucial aspects of the development of lithium-sulfur (Li-S) batteries, especially in high-loading sulfur electrodes and low electrolyte/sulfur (E/S) ratios. The sluggish reaction in the low E/S ratio induces poor LiPS solubility and unstable Li2S electrodeposition, resulting in limited sulfur utilization, especially under high-loading sulfur electrode. In this study, we report on salt concentration effects that improve sulfur utilization with a high-loading cathode (6 mgsulfur cm−2), a high sulfur content (80 wt%) and a low E/S ratio (5 mL gsulfur−1). On the basis of the rapid LiPS dissolving in a low concentration electrolyte, we established that the quantity of Li2S electrodeposition from a high Li+ diffusion coefficient, referring to the reduction of LiPS precipitation, was significantly enhanced by a faster kinetic. These results demonstrate the importance of kinetic factors for the rate capability and cycle life stability of Li-S battery electrolytes through high Li2S deposition under high-loading sulfur electrode.