Elabd, Ahmed Coskun, Ali Wook Choi, Jang Kim, Jiheon Sethio, Daniel Kang, Sangho Kang, Taemin 2022-07-07 Electrolyte engineering is a highly promising strategy in lithium−sulfur batteries to increase the sulfur utilization and maintain a stable interface at the lithium metal anode for long-term cycling. Whereas high donor electrolytes can increase the solubility of polysulfides to promote the sulfur utilization and therefore operate under lean electrolyte conditions, their poor thermodynamic stability toward lithium metal anode causes uncontrolled decomposition at its interface and impair the cycle life severely. Here, we introduce a dual functional high donor electrolyte, 3-fluoropyridine (3-FPN), to simultaneously achieve high polysulfide solubility up to 1.5 M and compatibility with lithium metal. These features result in a high specific capacity of 1087.9 mAh gsulfur−1 and robust cycling under a lean electrolyte condition of 7 μLelectrolyte mgsulfur−1 in the absence of LiNO3. Remarkably, 3-FPN preserves stable cyclability even at a high areal sulfur loading of 8 mgsulfur cm−2, which opens a new avenue in advancing the electrolytes for lithium−sulfur batteries toward their high volumetric energy density and long cycle life. application/pdf https://folia.unifr.ch/global/documents/322244 https://folia.unifr.ch/documents/322244/files/proof-2-2_0.pdf eng info:eu-repo/semantics/altIdentifier/doi/10.1021/acsenergylett.2c00874 info:eu-repo/semantics/altIdentifier/issn/2380-8195 info:eu-repo/semantics/openAccess CC BY-NC ACS Energy Letters. - American Chemical Society (ACS). - 2022, vol. 7, no. 8, p. 2459-2468 high donor solvent electrolyte sulfur energy storage info:eu-repo/classification/udc/54 Dual Functional High Donor Electrolytes for Lithium–Sulfur Batteries under Lithium Nitrate Free and Lean Electrolyte Conditions http://purl.org/coar/resource_type/c_6501