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The formidable shuttle effect of lithium polysulfides (LiPSs) and sluggish redox kinetics remain two major obstacles for the commercialization of lithium‑sulfur (Li[sbnd]S) batteries. Herein, vanadium-doped tungsten sulfide nanograss arrays with abundant edge sites and 1 T/2H heterophase interfaces that directly grown on carbon cloth (denoted as CC@V-WS2) has been rationally designed for Li[sbnd]S batteries. The exposure of abundant edge sites significantly enhances the chemical affinity and catalytic activity with respect to LiPSs, and also guides the uniform deposition of Li2S precipitate. Meanwhile, the coexistence of metallic 1 T and semiconducting 2H phases greatly enhances the electrical conductivity and facilitates the charge transfer. Moreover, these unique structural and compositional features cause noticeable in situ lithium ion intercalation into CC@V-WS2 during the electrochemical processes, thereby further improving the electrochemical performance. Consequently, Li[sbnd]S batteries equipped with the CC@V-WS2 interlayers exhibit a high initial discharge capacity of 1182.6 mAh g−1 at 0.1C, outstanding rate performance (657.4 mAh g−1 at 5C), and long-term cycling durability (low capacity fading ratio of only 0.046% per cycle over 800 cycles at 3C). Even under harsh working conditions of high sulfur loading (6.0 mg cm−2) and lean electrolyte (7.5 μL mg−1), the battery still delivers a high discharge capacity of 776.6 mAh g−1 at 0.2C after 60 cycles. Furthermore, theoretical calculations confirm that CC@V-WS2 possesses stronger chemical adsorption capability and better catalytic activity toward LiPSs than CC@WS2. This contribution provides valuable guidance for designing advanced two-dimensional (2D) transition metal dichalcogenides for Li[sbnd]S batteries. © 2025
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Chemical Engineering Journal
ISSN: 1385-8947
Year: 2025
Volume: 519
1 3 . 4 0 0
JCR@2023
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ESI Highly Cited Papers on the List: 0 Unfold All
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