Unlocking Liquid Sulfur Chemistry for Fast-Charging Lithium-Sulfur Batteries

Fangyi Shi; Xuyun Guo; Chunhong Chen; Lyuchao Zhuang; Jingya Yu; Qi Qi; Ye Zhu; Zheng Long Xu; Shu Ping Lau

doi:10.1021/acs.nanolett.3c01633

Unlocking Liquid Sulfur Chemistry for Fast-Charging Lithium-Sulfur Batteries

Fangyi Shi, Xuyun Guo, Chunhong Chen, Lyuchao Zhuang, Jingya Yu, Qi Qi, Ye Zhu, Zheng Long Xu, Shu Ping Lau

Research output: Journal article publication › Journal article › Academic research › peer-review

11 Citations (Scopus)

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.

Original language	English
Pages (from-to)	7906-7913
Number of pages	8
Journal	Nano Letters
Volume	23
Issue number	17
DOIs	https://doi.org/10.1021/acs.nanolett.3c01633
Publication status	Published - Aug 2023

Keywords

fast charging
in situ optical microscopy
in situ Raman spectroscopy
liquid sulfur
lithium−sulfur battery

ASJC Scopus subject areas

Bioengineering
General Chemistry
General Materials Science
Condensed Matter Physics
Mechanical Engineering

More information

10.1021/acs.nanolett.3c01633

http://hdl.handle.net/10397/106853

Cite this

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title = "Unlocking Liquid Sulfur Chemistry for Fast-Charging Lithium-Sulfur Batteries",

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",

author = "Fangyi Shi and Xuyun Guo and Chunhong Chen and Lyuchao Zhuang and Jingya Yu and Qi Qi and Ye Zhu and Xu, {Zheng Long} and Lau, {Shu Ping}",

note = "Funding Information: The work described in this paper was fully supported by grants from the National Natural Science Foundation of China for Young Scholars (52102310), the Research Grants Council of the Hong Kong Special Administrative Region, China (grant nos. 25216121, 15303219, C5029-18E, and 15306321), and the Research Committee of the Hong Kong Polytechnic University (A-PB1M, 1-BBXK, 1-CD4M, 1-BBDC, and G-UAMV). Publisher Copyright: {\textcopyright} 2023 The Authors. Published by American Chemical Society",

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AU - Qi, Qi

AU - Zhu, Ye

AU - Xu, Zheng Long

AU - Lau, Shu Ping

N1 - Funding Information: The work described in this paper was fully supported by grants from the National Natural Science Foundation of China for Young Scholars (52102310), the Research Grants Council of the Hong Kong Special Administrative Region, China (grant nos. 25216121, 15303219, C5029-18E, and 15306321), and the Research Committee of the Hong Kong Polytechnic University (A-PB1M, 1-BBXK, 1-CD4M, 1-BBDC, and G-UAMV). Publisher Copyright: © 2023 The Authors. Published by American Chemical Society

PY - 2023/8

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N2 - 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.

AB - 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.

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Unlocking Liquid Sulfur Chemistry for Fast-Charging Lithium-Sulfur Batteries

Abstract

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