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http://hdl.handle.net/10397/106853
Title: | Unlocking liquid sulfur chemistry for fast-charging lithium-sulfur batteries | Authors: | Shi, F Guo, X Chen, C Zhuang, L Yu, J Qi, Q Zhu, Y Xu, ZL Lau, SP |
Issue Date: | 13-Sep-2023 | Source: | Nano letters, 13 Sept 2023, v. 23, no. 17, p. 7906-7913 | Abstract: | A recent study of liquid sulfur produced in an electrochemical cell has prompted further investigation into regulating Li–S oxidation chemistry. In this research, we examined the liquid-to-solid sulfur transition dynamics by visually observing the electrochemical generation of sulfur on a graphene-based substrate. We investigated the charging of polysulfides at various current densities and discovered a quantitative correlation between the size and number density of liquid sulfur droplets and the applied current. However, the areal capacities exhibited less sensitivity. This observation offers valuable insights for designing fast-charging sulfur cathodes. By incorporating liquid sulfur into Li–S batteries with a high sulfur loading of 4.2 mg cm–2, the capacity retention can reach ∼100%, even when increasing the rate from 0.1 to 3 C. This study contributes to a better understanding of the kinetics involved in the liquid–solid sulfur growth in Li–S chemistry and presents viable strategies for optimizing fast-charging operations. | Keywords: | Fast charging In situ optical microscopy In situ Raman spectroscopy Liquid sulfur Lithium−sulfur battery |
Publisher: | American Chemical Society | Journal: | Nano letters | ISSN: | 1530-6984 | EISSN: | 1530-6992 | DOI: | 10.1021/acs.nanolett.3c01633 | Rights: | © 2023 The Authors. Published by American Chemical Society This article is licensed under CC-BY-NC-ND 4.0 (https://creativecommons.org/licenses/by-nc-nd/4.0/) The following publication Shi, F., Guo, X., Chen, C., Zhuang, L., Yu, J., Qi, Q., Zhu, Y., Xu, Z.-L., & Lau, S. P. (2023). Unlocking Liquid Sulfur Chemistry for Fast-Charging Lithium–Sulfur Batteries. Nano Letters, 23(17), 7906-7913 is available at https://doi.org/10.1021/acs.nanolett.3c01633. |
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