The Polymer Society of Korea

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Kinetically Engineered Interfacial Architecture via Optimized Formation Protocol for Stable Anode-free Lithium–Sulfur Batteries: Synergistic Regulation of SEI Chemistry and Morphology

조재원 (성균관대학교)

김수찬 (성균관대학교)

조재원 (성균관대학교), 김수찬 (성균관대학교)

Anode-free lithium–sulfur (Li–S) batteries offer high theoretical energy density but are plagued by distinct challenges: the notorious polysulfide shuttle effect and an unstable solid electrolyte interphase (SEI). This study investigates the critical role of formation kinetics in regulating interfacial chemistry and demonstrate that the initial formation C-rate dictates SEI quality. A slow rate (0.05 C) exacerbates polysulfide dissolution causing surface passivation, whereas a fast rate (1 C) induces uneven Li deposition. An optimized 0.1 C protocol facilitates the in-situ construction of a robust SEI rich in inorganic LiF and nitrogen-containing species. This engineered interface effectively suppresses polysulfide shuttling and ensures uniform lithium plating, enabling superior cycling stability. This work provides fundamental insight into the kinetic control of SEI formation, offering a practical route toward high-perfomance anode-free battery.

3PS-181

2026-04-10  08:30 - 10:00