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Title: A Facile, Low-Cost Hot-Pressing Process for Fabricating Lithium-Sulfur Cells with Stable Dynamic and Static Electrochemistry

Abstract

Abstract Lithium–sulfur batteries are among the most promising low‐cost, high‐energy‐density storage devices. However, the inability to host a sufficient amount of sulfur in the cathode while maintaining good electrochemical stability under a lean electrolyte condition has limited the progress. The main cause of these challenges is the sensitivity of the sulfur cathode to the cell‐design parameters (i.e., the amount of sulfur and electrolyte) and the experimental testing conditions (i.e., cycling rates and analysis duration). Here, a hot‐pressing method is presented that effectively encapsulates a high amount of sulfur in the cathode within only 5 s, resulting in high sulfur loading and content of, respectively, 10 mg cm −2 and 65 wt%. The hot‐pressed sulfur (HPS) cathodes exhibit superior dynamic and static electrochemical performance under a broad cycling‐rate (C/20–1C rates) and low electrolyte/sulfur ratio (6 µL mg −1 ) conditions. The dynamic cell stability is demonstrated by high gravimetric and areal capacities of, respectively, 415–730 mAh g −1 and 7–12 mAh cm −2 at C/20–1C rates with a high capacity retention of over 70% after 200 cycles. The static cell stability is demonstrated by excellent shelf life with low self‐discharge and stable cycle life on storing for over one year.

Authors:
 [1];  [1]; ORCiD logo [1]
  1. Univ. of Texas at Austin, Austin, TX (United States)
Publication Date:
Research Org.:
Univ. of Texas, Austin, TX (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1488291
Alternate Identifier(s):
OSTI ID: 1479580
Grant/Contract Number:  
EE0007218; DE‐EE0007218
Resource Type:
Accepted Manuscript
Journal Name:
Advanced Materials
Additional Journal Information:
Journal Volume: 30; Journal Issue: 46; Journal ID: ISSN 0935-9648
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; electrochemical stability; high loading; hot‐pressing; lean electrolyte; lithium–sulfur batteries

Citation Formats

Chung, Sheng -Heng, Lai, Ke -Yu, and Manthiram, Arumugam. A Facile, Low-Cost Hot-Pressing Process for Fabricating Lithium-Sulfur Cells with Stable Dynamic and Static Electrochemistry. United States: N. p., 2018. Web. doi:10.1002/adma.201805571.
Chung, Sheng -Heng, Lai, Ke -Yu, & Manthiram, Arumugam. A Facile, Low-Cost Hot-Pressing Process for Fabricating Lithium-Sulfur Cells with Stable Dynamic and Static Electrochemistry. United States. https://doi.org/10.1002/adma.201805571
Chung, Sheng -Heng, Lai, Ke -Yu, and Manthiram, Arumugam. Thu . "A Facile, Low-Cost Hot-Pressing Process for Fabricating Lithium-Sulfur Cells with Stable Dynamic and Static Electrochemistry". United States. https://doi.org/10.1002/adma.201805571. https://www.osti.gov/servlets/purl/1488291.
@article{osti_1488291,
title = {A Facile, Low-Cost Hot-Pressing Process for Fabricating Lithium-Sulfur Cells with Stable Dynamic and Static Electrochemistry},
author = {Chung, Sheng -Heng and Lai, Ke -Yu and Manthiram, Arumugam},
abstractNote = {Abstract Lithium–sulfur batteries are among the most promising low‐cost, high‐energy‐density storage devices. However, the inability to host a sufficient amount of sulfur in the cathode while maintaining good electrochemical stability under a lean electrolyte condition has limited the progress. The main cause of these challenges is the sensitivity of the sulfur cathode to the cell‐design parameters (i.e., the amount of sulfur and electrolyte) and the experimental testing conditions (i.e., cycling rates and analysis duration). Here, a hot‐pressing method is presented that effectively encapsulates a high amount of sulfur in the cathode within only 5 s, resulting in high sulfur loading and content of, respectively, 10 mg cm −2 and 65 wt%. The hot‐pressed sulfur (HPS) cathodes exhibit superior dynamic and static electrochemical performance under a broad cycling‐rate (C/20–1C rates) and low electrolyte/sulfur ratio (6 µL mg −1 ) conditions. The dynamic cell stability is demonstrated by high gravimetric and areal capacities of, respectively, 415–730 mAh g −1 and 7–12 mAh cm −2 at C/20–1C rates with a high capacity retention of over 70% after 200 cycles. The static cell stability is demonstrated by excellent shelf life with low self‐discharge and stable cycle life on storing for over one year.},
doi = {10.1002/adma.201805571},
journal = {Advanced Materials},
number = 46,
volume = 30,
place = {United States},
year = {Thu Oct 04 00:00:00 EDT 2018},
month = {Thu Oct 04 00:00:00 EDT 2018}
}

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Cited by: 25 works
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Figures / Tables:

Figure 1 Figure 1: (a) Illustration of the HPS cathode manufacturing process. Microstructure of the (b) uncycled, (c) 200-cycled, and (d) one-year-rested HPS cathodes. In Figure 1b-1d, the upper and lower panels show, respectively, the outer and inner surface SEM/EDS inspections.

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