Sulfur Vacancies in MoS2 for Lithium Sulfur Batteries
Qingbin JIANG, Huifang XU, Jamal NAYFEH, Kwan San HUI, Kwun Nam HUI
Abstract. Defects within layered MoS₂ can substantially alter its electronic structure and, in turn, its catalytic behaviour toward sulfur conversion in lithium–sulfur (Li–S) batteries. In this study, sulfur-deficient MoS₂ was produced through controlled annealing and evaluated as a separator coating. As demonstrated by spectroscopic measurements and first-principles calculations, the elimination of sulfur leads to the formation of new states close to the Fermi level, which facilitates faster electron conduction and enables the enhancement of its interaction with lithium polysulfides. Addition of this vacancy-containing material to a separator increases the completeness of the redox reaction rate of sulfur and allows a capacity of 886 mAh g-1 after 100 cycles at 0.5 C. Such results indicate that intentional vacuity manipulation is an effective pathway towards tuning MoS₂ to LiS electrochemistry and provide a guide to the role of local disorder in catalysis.
Keywords
Lithium Sulfur Battery, Molybdenum Disulfide, Polysulfide Shuttle, Stability, Vacancy-Modulated Electrocatalysts
Published online 4/25/2026, 6 pages
Copyright © 2026 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: Qingbin JIANG, Huifang XU, Jamal NAYFEH, Kwan San HUI, Kwun Nam HUI, Sulfur Vacancies in MoS2 for Lithium Sulfur Batteries, Materials Research Proceedings, Vol. 64, pp 579-584, 2026
DOI: https://doi.org/10.21741/9781644904091-72
The article was published as article 72 of the book Energy Futures
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
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