Synergistic Effect of High Donor Electrolyte and Catalytic Separator for Practical Lithium–Sulfur Batteries

Open AccessRenewablesRESEARCH ARTICLES26 Jul 2024Synergistic Effect of High Donor Electrolyte and Catalytic Separator for Practical Lithium-Sulfur Batteries Yongxin Xiao, Qianhui He, Lin Peng, Jingwen Liu, Xiaoxian Guan, Luyi Chen, Yue-Peng Cai and Qifeng Zheng Yongxin Xiao , Qianhui He , Lin Peng , Jingwen Liu , Xiaoxian Guan , Luyi Chen , Yue-Peng Cai and Qifeng Zheng Citation: Renewables. 2024;0:1–56https://doi.org/10.31635/renewables.024.202400065 SectionsSupplemental MaterialAboutPDF ToolsAdd to favoritesDownload CitationsTrack Citations ShareFacebookTwitterLinked InEmail The commercialization of lithium-sulfur (Li-S) batteries has been hampered by the low utilization of S that results in low practical energy density and the severe shuttle effect of lithium polysulfides (LiPSs) that leads to poor cycle life. Herein, a combined strategy of electrolyte engineering and separator functionalization is proposed to solve the conflict between high S utilization and cycling life. In which, the high donor electrolyte is demonstrated to regulate the solvation of LiPSs with the formation of S3•−. to induce radical-assisted efficient conversion pathway and 3D Li2S deposition, which greatly enhances the S utilization while exacerbating the shuttling of LiPSs. Fortunately, the carbon nanosheet-based modified separator with abundant Zn-Co diatomic metal sites efficiently inhibits the shuttling of LiPSs by catalyzing the conversion reaction of LiPSs. Hence, the resulting Li-S battery delivers a remarkably high capacity of 1300 mAh g−1 with high average coulombic efficiency of 99.4% during cycling. Even at a high S mass loading (9.3 mg cm−2) and lean electrolyte condition (E/S = 3 μL mg−1), the Li-S battery can still deliver a high capacity of 1088 mAh g−1, representing a significant advancement in designing practically high energy Li-S batteries with long cycle life. Download figure Download PowerPoint Next article FiguresReferencesRelatedDetails Issue AssignmentNot Yet AssignedSupporting Information Copyright & Permissions© 2024 Chinese Chemical Society Downloaded 0 times PDF downloadLoading ...