biostudies-literatureWang ZChinese Academy of SciencesJiangsu Funding Program for Excellent Postdoctoral TalentNational Key R&D Program of ChinaNational Natural Science Foundation of ChinaNational Key Research and Development Program of Chinae17305https://www.ebi.ac.uk/biostudies/studies/S-EPMC12499459biostudies-literatureUnknown12(37)The performance of lithium-sulfur (Li-S) batteries is crucially affected by the anodic stability of Li-metal and cathodic conversion kinetics of sulfur-carbon (S/C) composites. Herein, a weakly solvating electrolyte (WSE) with moderate lithium polysulfides (LiPSs) solubility, consisting of 1 M lithium bis(trifluoromethane sulfonyl) imide (LiTFSI) in non-fluorinated solvent of cyclopentyl methyl ether (CPME) and 1,3-dioxolane (DOL) additive, is employed in Li-S batteries to simultaneously achieve high anodic stability and appropriate cathodic kinetics. This WSE exhibits a good capability of suppressing LiPSs shuttling by forming an anions-dominated Li⁺ solvation structure, effectively inducing a stable solid electrolyte interphase (SEI) to guarantee anodic stability of the Li-metal anode. Additionally, the DOL additive in the WSE aids in forming a thin organic-inorganic hybrid cathode electrolyte interphase (CEI) on the surface of S/Li₂S particles, which maintains good conversion kinetics and suppresses dead S/Li₂S growth in the S/C cathode. Consequently, Li-S batteries with the WSE deliver a high initial capacity (≈1208 mAh g^-1), a high average Coulombic efficiency (≈98.6%), and a high capacity retention rate (≈82.4%) over 200 cycles. Stable cycling performance over 100 cycles is also observed in the Li-S pouch cell with the WSE even under harsh conditions.Advanced science (Weinheim, Baden-Wurttemberg, Germany)Balancing Anodic Stability and Cathodic Kinetics in Practical Lithium-Sulfur Batteries With Non-fluorinated Weakly Solvating Solvents.PMC124994592151232023ZB392220753142023ZB8362024ZB0512022YFE020730022179142Zhang FLi HWeng SHuang DLiu LZhang HChen LYao XWu GTu HXu JWang LZheng JWang QLu SXue JWang ZWu XfalseBalancing Anodic Stability and Cathodic Kinetics in Practical Lithium-Sulfur Batteries With Non-fluorinated Weakly Solvating Solvents.The performance of lithium-sulfur (Li-S) batteries is crucially affected by the anodic stability of Li-metal and cathodic conversion kinetics of sulfur-carbon (S/C) composites. Herein, a weakly solvating electrolyte (WSE) with moderate lithium polysulfides (LiPSs) solubility, consisting of 1 M lithium bis(trifluoromethane sulfonyl) imide (LiTFSI) in non-fluorinated solvent of cyclopentyl methyl ether (CPME) and 1,3-dioxolane (DOL) additive, is employed in Li-S batteries to simultaneously achieve high anodic stability and appropriate cathodic kinetics. This WSE exhibits a good capability of suppressing LiPSs shuttling by forming an anions-dominated Li⁺ solvation structure, effectively inducing a stable solid electrolyte interphase (SEI) to guarantee anodic stability of the Li-metal anode. Additionally, the DOL additive in the WSE aids in forming a thin organic-inorganic hybrid cathode electrolyte interphase (CEI) on the surface of S/Li₂S particles, which maintains good conversion kinetics and suppresses dead S/Li₂S growth in the S/C cathode. Consequently, Li-S batteries with the WSE deliver a high initial capacity (≈1208 mAh g^-1), a high average Coulombic efficiency (≈98.6%), and a high capacity retention rate (≈82.4%) over 200 cycles. Stable cycling performance over 100 cycles is also observed in the Li-S pouch cell with the WSE even under harsh conditions.2025-01-01T00:00:00Z2025 Oct2026-06-04T04:48:13.315Z2026-05-05T03:12:35.406ZS-EPMC124994594060541610.1002/advs.202417305